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Okehampton Bay Water Quality Monitoring Results August 2017 to December 2019

D e p a r t m e n t o f P r i m a r y I n d u s t r i e s , Pa r k s , Wa t e r a n d E n v i ro n m e n t

April 2020

Publishing Information Citation: EPA Tasmania (2020) Okehampton Bay Water Quality Monitoring Results August 2017 to December 2019, EPA Tasmania, Hobart, Tasmania. Date: April 2020 Enquiries: EPA Tasmania Department of Primary Industries, Parks, Water and Environment GPO Box 1550 Hobart, Tasmania 7001 Telephone: (03) 6165 4599 Email: Water@epa.tas.gov.au Web: www.epa.tas.gov.au Copyright: © The Crown in the Right of Tasmania Disclaimer: The information provided in this document is provided in good faith. The Crown, its officers, employees and agents do not accept liability however arising, including liability for negligence, for any loss resulting from the use of or reliance upon the information in this document and/or reliance on its availability at any time.

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Table of Contents

Introduction ......................................................................................................................................... 6 1. August 2017 ..................................................................................................................................... 6

1.1 Dissolved oxygen ........................................................................................................................ 6 1.2 Salinity ........................................................................................................................................ 7 1.3 Temperature .............................................................................................................................. 7 1.4 Nutrients .................................................................................................................................... 8

2. September 2017 ............................................................................................................................... 9 2.1 Dissolved oxygen ........................................................................................................................ 9 2.2 Salinity ........................................................................................................................................ 9 2.3 Temperature ............................................................................................................................ 10 2.4 Nutrients .................................................................................................................................. 11

3. October 2017 ................................................................................................................................. 12 3.1 Dissolved oxygen ...................................................................................................................... 12 3.2 Salinity ...................................................................................................................................... 12 3.3 Temperature ............................................................................................................................ 13 3.4 Nutrients .................................................................................................................................. 14

4. November 2017.............................................................................................................................. 15 4.1 Dissolved oxygen ...................................................................................................................... 15 4.2 Salinity ...................................................................................................................................... 15 4.3 Temperature ............................................................................................................................ 16 4.4 Nutrients .................................................................................................................................. 17

5. December 2017 .............................................................................................................................. 18 5.1 Dissolved oxygen ...................................................................................................................... 18 5.3 Temperature ............................................................................................................................ 19 5.4 Nutrients .................................................................................................................................. 20

6. January 2018 .................................................................................................................................. 21 6.1 Dissolved oxygen ...................................................................................................................... 21 6.3 Temperature ............................................................................................................................ 22 6.4 Nutrients .................................................................................................................................. 23

7. February 2018 ................................................................................................................................ 24 7.1 Dissolved oxygen ...................................................................................................................... 24 7.2 Salinity ...................................................................................................................................... 24 7.3 Temperature ............................................................................................................................ 25 7.4 Nutrients .................................................................................................................................. 26

8. March 2018 .................................................................................................................................... 27 8.1 Dissolved oxygen ...................................................................................................................... 27 8.3 Temperature ............................................................................................................................ 28 8.4 Nutrients .................................................................................................................................. 29

9. May 2018........................................................................................................................................ 30 9.1 Dissolved oxygen ...................................................................................................................... 30 9.2 Salinity ...................................................................................................................................... 30 9.3 Temperature ............................................................................................................................ 31 9.4 Nutrients .................................................................................................................................. 32

10. June 2018 ..................................................................................................................................... 33 10.1 Dissolved oxygen .................................................................................................................... 33

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10.3 Temperature .......................................................................................................................... 34 10.4 Nutrients ................................................................................................................................ 35

11. July 2018 ....................................................................................................................................... 36 11.1 Dissolved oxygen .................................................................................................................... 36 11.2 Salinity .................................................................................................................................... 36 11.3 Temperature .......................................................................................................................... 37 11.4 Nutrients ................................................................................................................................ 38

12. August 2018 ................................................................................................................................. 39 12.1 Dissolved oxygen .................................................................................................................... 39 12.3 Temperature .......................................................................................................................... 40 12.4 Nutrients ................................................................................................................................ 41

13. September 2018 ........................................................................................................................... 42 13.1 Dissolved oxygen .................................................................................................................... 42 13.2 Salinity .................................................................................................................................... 42 13.3 Temperature .......................................................................................................................... 43 13.4 Nutrients ................................................................................................................................ 44

14. October 2018 ............................................................................................................................... 45 14.1 Dissolved oxygen .................................................................................................................... 45 14.2 Salinity .................................................................................................................................... 45 14.3 Temperature .......................................................................................................................... 46 14.4 Nutrients ................................................................................................................................ 47

15. November 2018 ........................................................................................................................... 48 15.1 Dissolved oxygen .................................................................................................................... 48 15.2 Salinity .................................................................................................................................... 48 15.3 Temperature .......................................................................................................................... 49 15.4 Nutrients ................................................................................................................................ 50

16. December 2018 ............................................................................................................................ 51 16.1 Dissolved oxygen .................................................................................................................... 51 16.2 Salinity .................................................................................................................................... 51 16.3 Temperature .......................................................................................................................... 52 16.4 Nutrients ................................................................................................................................ 53

17. January 2019 ................................................................................................................................ 54 17.1 Dissolved oxygen .................................................................................................................... 54 17.2 Salinity .................................................................................................................................... 54 17.3 Temperature .......................................................................................................................... 55 17.4 Nutrients ................................................................................................................................ 56

18. February 2019 .............................................................................................................................. 57 18.1 Dissolved oxygen .................................................................................................................... 57 18.2 Salinity .................................................................................................................................... 57 18.3 Temperature .......................................................................................................................... 58 18.4 Nutrients ................................................................................................................................ 59

19. March 2019 .................................................................................................................................. 60 19.1 Dissolved oxygen .................................................................................................................... 60 19.2 Salinity .................................................................................................................................... 60 19.3 Temperature .......................................................................................................................... 61 19.4 Nutrients ................................................................................................................................ 62

20. April 2019 ..................................................................................................................................... 63 20.1 Dissolved oxygen .................................................................................................................... 63

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20.2 Salinity .................................................................................................................................... 63 20.3 Temperature .......................................................................................................................... 64 20.4 Nutrients ................................................................................................................................ 65

21. May 2019...................................................................................................................................... 66 21.1 Dissolved oxygen .................................................................................................................... 66 21.2 Salinity .................................................................................................................................... 66 21.3 Temperature .......................................................................................................................... 67 21.4 Nutrients ................................................................................................................................ 68

22. June 2019 ..................................................................................................................................... 69 22.1 Dissolved oxygen .................................................................................................................... 69 22.2 Salinity .................................................................................................................................... 69 22.3 Temperature .......................................................................................................................... 70 22.4 Nutrients ................................................................................................................................ 71

23. July 2019 ....................................................................................................................................... 72 23.1 Dissolved oxygen .................................................................................................................... 72 23.2 Salinity .................................................................................................................................... 72 23.3 Temperature .......................................................................................................................... 73 23.4 Nutrients ................................................................................................................................ 74

24. August 2019 ................................................................................................................................. 75 24.1 Dissolved oxygen .................................................................................................................... 75 24.2 Salinity .................................................................................................................................... 75 24.3 Temperature .......................................................................................................................... 76 24.4 Nutrients ................................................................................................................................ 77

25. September 2019 ........................................................................................................................... 78 25.1 Dissolved oxygen .................................................................................................................... 78 25.2 Salinity .................................................................................................................................... 78 25.3 Temperature .......................................................................................................................... 79 25.4 Nutrients ................................................................................................................................ 80

26. December 2019 ............................................................................................................................ 81 26.1 Dissolved oxygen .................................................................................................................... 81 26.2 Salinity .................................................................................................................................... 81 26.3 Temperature .......................................................................................................................... 82 26.4 Nutrients ................................................................................................................................ 83

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Introduction

This report presents the results for water quality monitoring carried out at Okehampton Bay, Tasmania for the period August 2017 to December 2019.

1. August 2017

1.1 Dissolved oxygen

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1.2 Salinity

1.3 Temperature

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1.4 Nutrients August 2017 TAN

(mg/L) Nitrogen

Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate

Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.005 0.39 0.009 0.03 <0.1

10m <0.005 0.41 0.008 0.03 <0.1

Bottom 0.006 0.39 0.008 0.03 0.1

Int (12m) 1.7

EPA-MP3 Surface <0.005 0.38 0.008 0.03 0.1

10m 0.005 0.38 0.008 0.03 <0.1

Bottom 0.008 0.4 0.008 0.03 0.1

Int (12m) 1.9

EPA-MP4 Surface <0.005 0.38 0.009 0.03 <0.1

10m <0.005 0.37 0.008 0.03 <0.1

Bottom 0.008 0.36 0.009 0.03 0.1

Int (12m) 1.8

EPA-MP5 Surface <0.005 0.37 0.009 0.03 0.1

10m <0.005 0.38 0.009 0.03 0.1

Bottom <0.005 0.37 0.01 0.03 0.1

Int (12m) 1.1

EPA-MP6 Surface <0.005 0.38 0.008 0.03 <0.1

10m <0.005 0.35 0.008 0.03 <0.1

Bottom 0.006 0.36 0.007 0.02 <0.1

Int (12m) 1.5

EPA-MP7 Surface <0.005 0.4 0.009 0.03 <0.1

10m <0.005 0.4 0.009 0.03 <0.1

Bottom <0.005 0.39 0.008 0.03 <0.1

Int (12m) 1.5

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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2. September 2017

2.1 Dissolved oxygen

2.2 Salinity

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2.3 Temperature

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2.4 Nutrients September 2017 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.005 0.33 0.006 0.02 <0.1

10m <0.005 0.34 0.006 0.02 <0.1

Bottom 0.006 0.34 0.006 0.02 <0.1

Int (12m)

1

EPA-MP3 Surface <0.005 0.33 0.007 0.02 <0.1

10m <0.005 0.33 0.007 0.02 0.1

Bottom 0.007 0.35 0.007 0.03 0.1

Int (12m)

1.4

EPA-MP4 Surface <0.005 0.34 0.006 0.02 <0.1

10m <0.005 0.3 0.006 0.02 <0.1

Bottom <0.005 0.32 0.006 0.02 <0.1

Int (12m)

1.4

EPA-MP5 Surface 0.006 0.31 0.006 0.02 <0.1

10m <0.005 0.32 0.006 0.02 <0.1

Bottom <0.005 0.28 0.006 0.02 0.1

Int (12m)

1.2

EPA-MP6 Surface 0.006 0.3 0.005 0.02 <0.1

10m 0.006 0.3 0.006 0.02 <0.1

Bottom 0.007 0.3 0.006 0.02 0.1

Int (12m)

1.3

EPA-MP7 Surface <0.005 0.36 0.005 0.02 0.1

10m <0.005 0.38 0.006 0.03 0.1

Bottom 0.005 0.28 0.006 0.02 0.1

Int (12m)

1.3

< = below limit of reporting, TAN = Total Ammonia Nitrogen Chla = Chlorophyll a

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3. October 2017

3.1 Dissolved oxygen

3.2 Salinity

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3.3 Temperature

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3.4 Nutrients October 2017 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.32 0.005 0.03 <0.1

10m <0.005 0.31 0.006 0.04 <0.1

Bottom <0.005 0.31 0.006 0.04 <0.1

Int (12m)

0.7

EPA-MP3 Surface <0.005 0.32 0.005 0.04 0.1

10m <0.005 0.32 0.005 0.04 0.1

Bottom <0.005 0.32 0.007 0.04 0.1

Int (12m)

1.7

EPA-MP4 Surface <0.005 0.31 0.005 0.04 <0.1

10m <0.005 0.32 0.005 0.03 <0.1

Bottom <0.005 0.34 0.006 0.03 <0.1

Int (12m)

0.7

EPA-MP5 Surface <0.005 0.3 0.005 0.04 <0.1

10m <0.005 0.3 0.005 0.04 <0.1

Bottom <0.005 0.31 0.005 0.04 <0.1

Int (12m)

1.2

EPA-MP6 Surface <0.005 0.3 0.005 0.04 0.1

10m <0.005 0.34 0.005 0.04 <0.1

Bottom <0.005 0.3 0.005 0.04 <0.1

Int (12m)

0.9

EPA-MP7 Surface <0.005 0.34 0.005 0.03 <0.1

10m <0.005 0.34 0.006 0.03 <0.1

Bottom <0.005 0.35 0.007 0.03 <0.1

Int (12m)

0.7

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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4. November 2017

4.1 Dissolved oxygen

4.2 Salinity

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4.3 Temperature

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4.4 Nutrients November 2017 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.44 0.007 0.03 0.1

10m <0.005 0.32 0.007 0.03 0.1

Bottom <0.005 0.31 0.007 0.03 0.1

Int (12m)

0.7

EPA-MP3 Surface <0.005 0.29 0.006 0.03 0.1

10m <0.005 0.32 0.007 0.02 0.1

Bottom 0.005 0.3 0.007 0.03 0.1

Int (12m)

1.2

EPA-MP4 Surface <0.005 0.29 0.007 0.03 0.1

10m <0.005 0.31 0.006 0.02 0.1

Bottom <0.005 0.32 0.007 0.02 0.1

Int (12m)

0.7

EPA-MP5 Surface <0.005 0.29 0.007 0.03 0.1

10m <0.005 0.27 0.007 0.03 0.1

Bottom 0.012 0.36 0.011 0.03 0.2

Int (12m)

0.8

EPA-MP6 Surface <0.005 0.3 0.007 0.03 0.1

10m <0.005 0.3 0.007 0.03 0.1

Bottom <0.005 0.32 0.007 0.03 <0.1

Int (12m)

0.8

EPA-MP7 Surface <0.005 0.33 0.007 0.03 0.1

10m <0.005 0.34 0.007 0.03 0.1

Bottom <0.005 0.34 0.007 0.03 0.1

Int (12m)

0.8

< = below limit of reporting, TAN = Total Ammonia Nitrogen Chla = Chlorophyll a

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5. December 2017

5.1 Dissolved oxygen

5.2 Salinity

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5.3 Temperature

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5.4 Nutrients December 2017 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.008 0.44 0.006 0.04 1.0

10m 0.012 0.33 0.006 0.04 0.2

Bottom 0.016 0.33 0.008 0.05 0.2

Int (12m)

1.4

EPA-MP3 Surface 0.006 0.32 0.007 0.04 0.1

10m 0.008 0.31 0.007 0.05 0.1

Bottom 0.011 0.32 0.008 0.05 0.2

Int (12m)

1.1

EPA-MP4 Surface 0.009 0.31 0.006 0.04 0.2

10m 0.008 0.32 0.007 0.04 0.1

Bottom 0.012 0.32 0.009 0.05 0.2

Int (12m)

1.1

EPA-MP5 Surface 0.010 0.27 0.006 0.04 0.2

10m 0.012 0.32 0.006 0.04 0.1

Bottom 0.006 0.30 0.006 0.05 0.2

Int (12m)

1.2

EPA-MP6 Surface 0.008 0.39 0.005 0.04 1.1

10m 0.009 0.30 0.005 0.04 0.2

Bottom 0.011 0.29 0.007 0.04 0.2

Int (12m)

1.3

EPA-MP7 Surface 0.006 0.37 0.005 0.05 0.8

10m 0.009 0.33 0.006 0.04 0.2

Bottom 0.013 0.35 0.007 0.04 0.2

Int (12m)

1.4

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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6. January 2018

6.1 Dissolved oxygen

6.2 Salinity

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6.3 Temperature

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6.4 Nutrients January 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.28 0.006 0.04 0.1

10m <0.005 0.36 0.006 0.04 0.1

Bottom <0.005 0.28 0.008 0.04 0.2

Int (12m)

0.7

EPA-MP3 Surface <0.005 0.28 0.005 0.03 0.1

10m <0.005 0.26 0.005 0.04 0.1

Bottom 0.009 0.32 0.015 0.05 0.2

Int (12m)

<0.5

EPA-MP4 Surface <0.005 0.28 0.006 0.04 0.1

10m <0.005 0.27 0.006 0.04 0.2

Bottom 0.008 0.34 0.014 0.05 0.2

Int (12m)

0.6

EPA-MP5 Surface <0.005 0.26 0.005 0.04 0.1

10m <0.005 0.27 0.007 0.04 0.1

Bottom 0.010 0.32 0.014 0.04 0.2

Int (12m)

<0.5

EPA-MP6 Surface <0.005 0.27 0.006 0.04 0.1

10m <0.005 0.27 0.006 0.04 0.1

Bottom 0.008 0.31 0.011 0.05 0.2

Int (12m)

0.5

EPA-MP7 Surface <0.005 0.33 0.007 0.04 0.1

10m <0.005 0.28 0.006 0.04 0.1

Bottom <0.005 0.29 0.007 0.04 0.2

Int (12m)

1.0

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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7. February 2018

7.1 Dissolved oxygen

7.2 Salinity

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7.3 Temperature

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7.4 Nutrients February 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.006 0.32 0.005 0.03 <0.1

10m <0.005 0.31 0.006 0.04 <0.1

Bottom 0.009 0.32 0.008 0.04 0.1

Int (12m)

0.9

EPA-MP3 Surface 0.005 0.29 0.005 0.03 <0.1

10m 0.005 0.30 0.005 0.03 <0.1

Bottom 0.019 0.31 0.010 0.04 0.1

Int (12m)

<0.5

EPA-MP4 Surface 0.005 0.28 0.004 0.03 <0.1

10m 0.005 0.30 0.004 0.03 <0.1

Bottom 0.015 0.32 0.010 0.04 0.1

Int (12m)

<0.5

EPA-MP5 Surface <0.005 0.27 0.004 0.03 <0.1

10m <0.005 0.29 0.004 0.03 <0.1

Bottom 0.013 0.30 0.009 0.03 0.1

Int (12m)

<0.5

EPA-MP6 Surface 0.008 0.30 0.007 0.03 <0.1

10m <0.005 0.28 0.005 0.03 <0.1

Bottom 0.009 0.29 0.009 0.04 0.1

Int (12m)

<0.5

EPA-MP7 Surface 0.007 0.32 0.005 0.04 <0.1

10m 0.007 0.33 0.006 0.04 <0.1

Bottom 0.008 0.31 0.007 0.03 0.1

Int (12m)

0.7

< = below limit of reporting, TAN = Total Ammonia Nitrogen Chla = Chlorophyll a

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8. March 2018

8.1 Dissolved oxygen

8.2 Salinity

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8.3 Temperature

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8.4 Nutrients March 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.007 0.32 0.005 0.03 <0.1

10m 0.006 0.31 0.005 0.03 <0.1

Bottom 0.005 0.30 0.006 0.03 <0.1

Int (12m)

1.4

EPA-MP3 Surface 0.005 0.28 0.004 0.03 <0.1

10m <0.005 0.27 0.003 0.03 <0.1

Bottom 0.010 0.30 0.010 0.04 0.1

Int (12m)

<0.5

EPA-MP4 Surface 0.006 0.28 0.005 0.03 <0.1

10m 0.009 0.29 0.005 0.03 <0.1

Bottom <0.005 0.30 0.007 0.03 <0.1

Int (12m)

<0.5

EPA-MP5 Surface 0.006 0.29 0.006 0.03 <0.1

10m <0.005 0.29 0.005 0.03 <0.1

Bottom 0.008 0.30 0.007 0.03 <0.1

Int (12m)

<0.5

EPA-MP6 Surface 0.005 0.28 0.006 0.03 <0.1

10m <0.005 0.27 0.005 0.03 <0.1

Bottom 0.008 0.30 0.008 0.03 <0.1

Int (12m)

<0.5

EPA-MP7 Surface 0.005 0.29 0.007 0.03 <0.1

10m 0.005 0.31 0.007 0.03 <0.1

Bottom 0.006 0.30 0.006 0.03 <0.1

Int (12m)

0.6

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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9. May 2018

9.1 Dissolved oxygen

9.2 Salinity

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9.3 Temperature

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9.4 Nutrients May 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.022 0.32 0.009 0.04 0.1

10m 0.017 0.32 0.008 0.04 0.1

Bottom 0.015 0.33 0.009 0.04 0.1

Int (12m)

0.9 EPA-MP3 Surface 0.008 0.31 0.008 0.04 0.1

10m 0.008 0.31 0.008 0.04 0.1

Bottom 0.006 0.31 0.007 0.04 0.1

Int (12m)

0.8 EPA-MP4 Surface 0.010 0.32 0.009 0.03 0.1

10m 0.008 0.30 0.008 0.03 0.1

Bottom 0.008 0.32 0.008 0.03 0.1

Int (12m)

0.8 EPA-MP5 Surface 0.008 0.30 0.007 0.04 0.1

10m 0.008 0.32 0.008 0.04 0.1

Bottom 0.006 0.30 0.007 0.03 0.1

Int (12m)

1.2 EPA-MP6 Surface 0.010 0.31 0.009 0.03 0.1

10m 0.010 0.31 0.008 0.04 0.1

Bottom <0.005 0.30 0.006 0.04 0.1

Int (12m)

1.0 EPA-MP7 Surface 0.009 0.32 0.008 0.04 0.1

10m 0.011 0.34 0.008 0.04 0.1

Bottom 0.006 0.32 0.007 0.03 0.1

Int (12m)

0.9

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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10. June 2018

10.1 Dissolved oxygen

10.2 Salinity

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10.3 Temperature

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10.4 Nutrients June 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.29 0.009 0.04 0.1

10m 0.006 0.30 0.008 0.04 0.1

Bottom 0.006 0.30 0.009 0.04 0.1

Int (12m)

1.2

EPA-MP3 Surface 0.007 0.29 0.009 0.04 0.1

10m 0.007 0.29 0.009 0.03 0.1

Bottom 0.010 0.30 0.009 0.04 0.1

Int (12m)

1.0

EPA-MP4 Surface <0.005 0.25 0.009 0.03 0.1

10m <0.005 0.28 0.009 0.03 0.1

Bottom 0.007 0.26 0.009 0.03 0.1

Int (12m)

0.9

EPA-MP5 Surface 0.006 0.28 0.009 0.03 0.1

10m <0.005 0.28 0.009 0.03 0.1

Bottom 0.009 0.29 0.008 0.04 <0.1

Int (12m)

0.7

EPA-MP6 Surface <0.005 0.27 0.009 0.03 0.1

10m <0.005 0.28 0.009 0.04 0.1

Bottom <0.005 0.28 0.008 0.03 0.1

Int (12m)

0.8

EPA-MP7 Surface <0.005 0.31 0.009 0.04 0.1

10m <0.005 0.27 0.009 0.03 0.1

Bottom 0.005 0.34 0.008 0.03 0.1

Int (12m)

0.9

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 36

11. July 2018

11.1 Dissolved oxygen

11.2 Salinity

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11.3 Temperature

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11.4 Nutrients July 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.007 0.34 0.012 0.04 <0.1

10m 0.010 0.34 0.012 0.04 <0.1

Bottom 0.007 0.34 0.010 0.04 <0.1

Int (12m)

0.9

EPA-MP3 Surface <0.005 0.31 0.011 0.04 <0.1

10m <0.005 0.34 0.011 0.04 <0.1

Bottom 0.009 0.33 0.012 0.04 0.1

Int (12m)

0.5

EPA-MP4 Surface <0.005 0.34 0.012 0.04 <0.1

10m <0.005 0.36 0.011 0.04 <0.1

Bottom 0.006 0.33 0.011 0.04 <0.1

Int (12m)

0.6

EPA-MP5 Surface <0.005 0.33 0.010 0.04 <0.1

10m <0.005 0.33 0.012 0.04 <0.1

Bottom 0.007 0.34 0.012 0.04 <0.1

Int (12m)

0.6

EPA-MP6 Surface <0.005 0.33 0.009 0.04 0.2

10m <0.005 0.32 0.012 0.04 <0.1

Bottom 0.006 0.35 0.010 0.04 <0.1

Int (12m)

0.7

EPA-MP7 Surface 0.006 0.34 0.011 0.04 <0.1

10m 0.006 0.38 0.011 0.04 <0.1

Bottom 0.006 0.36 0.009 0.04 <0.1

Int (12m)

0.7

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 39

12. August 2018

12.1 Dissolved oxygen

12.2 Salinity

EPA Tasmania, April 2020 40

12.3 Temperature

EPA Tasmania, April 2020 41

12.4 Nutrients August 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.009 0.29 0.009 0.04 <0.1

10m 0.008 0.29 0.009 0.05 <0.1

Bottom 0.005 0.28 0.008 0.04 <0.1

Int (12m)

1.5

EPA-MP3 Surface 0.005 0.29 0.011 0.04 0.1

10m <0.005 0.29 0.011 0.04 0.1

Bottom 0.009 0.26 0.010 0.04 0.1

Int (12m)

0.6

EPA-MP4 Surface <0.005 0.30 0.010 0.04 0.1

10m <0.005 0.29 0.010 0.04 0.1

Bottom 0.008 0.29 0.010 0.04 0.1

Int (12m)

0.8

EPA-MP5 Surface <0.005 0.29 0.010 0.05 0.1

10m <0.005 0.29 0.010 0.04 0.1

Bottom 0.009 0.28 0.011 0.04 0.1

Int (12m)

0.8

EPA-MP6 Surface <0.005 0.26 0.008 0.04 <0.1

10m <0.005 0.27 0.008 0.04 <0.1

Bottom 0.006 0.26 0.008 0.04 0.1

Int (12m)

1.9

EPA-MP7 Surface 0.008 0.30 0.009 0.04 <0.1

10m 0.006 0.30 0.008 0.04 0.1

Bottom 0.008 0.29 0.009 0.04 0.1

Int (12m)

1.5

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 42

13. September 2018

13.1 Dissolved oxygen

13.2 Salinity

EPA Tasmania, April 2020 43

13.3 Temperature

EPA Tasmania, April 2020 44

13.4 Nutrients September 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.010 0.30 0.011 0.05 0.1

10m 0.010 0.36 0.011 0.05 0.1

Bottom 0.015 0.32 0.011 0.05 0.1

Int (12m)

0.9

EPA-MP3 Surface 0.006 0.33 0.010 0.05 <0.1

10m 0.007 0.32 0.010 0.05 <0.1

Bottom 0.012 0.31 0.010 0.05 <0.1

Int (12m)

1.5

EPA-MP4 Surface 0.008 0.33 0.009 0.05 <0.1

10m 0.007 0.23 0.009 0.05 <0.1

Bottom 0.008 0.29 0.009 0.05 <0.1

Int (12m)

2.0

EPA-MP5 Surface 0.011 0.27 0.012 0.05 0.1

10m 0.009 0.30 0.012 0.05 0.1

Bottom 0.012 0.29 0.012 0.05 <0.1

Int (12m)

0.6

EPA-MP6 Surface 0.007 0.29 0.010 0.05 <0.1

10m 0.007 0.29 0.010 0.05 <0.1

Bottom 0.009 0.29 0.009 0.04 <0.1

Int (12m)

1.4

EPA-MP7 Surface 0.007 0.34 0.009 0.05 <0.1

10m 0.007 0.34 0.009 0.05 <0.1

Bottom 0.009 0.28 0.010 0.04 0.1

Int (12m)

2.0

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 45

14. October 2018

14.1 Dissolved oxygen

14.2 Salinity

EPA Tasmania, April 2020 46

14.3 Temperature

EPA Tasmania, April 2020 47

14.4 Nutrients October 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.27 0.007 0.03 <0.1

10m <0.005 0.29 0.007 0.02 <0.1

Bottom <0.005 0.30 0.006 0.02 <0.1

Int (12m)

0.6

EPA-MP3 Surface 0.013 0.25 0.008 0.02 <0.1

10m <0.005 0.26 0.008 0.02 <0.1

Bottom <0.005 0.27 0.007 0.02 <0.1

Int (12m)

0.5

EPA-MP4 Surface <0.005 0.28 0.007 0.02 <0.1

10m <0.005 0.30 0.007 0.02 <0.1

Bottom <0.005 0.28 0.007 0.03 <0.1

Int (12m)

0.5

EPA-MP5 Surface 0.020 0.27 0.010 0.03 <0.1

10m <0.005 0.28 0.006 0.02 <0.1

Bottom <0.005 0.25 0.007 0.03 <0.1

Int (12m)

0.7

EPA-MP6 Surface <0.005 0.25 0.006 0.02 <0.1

10m <0.005 0.25 0.006 0.02 <0.1

Bottom <0.005 0.28 0.006 0.02 <0.1

Int (12m)

0.7

EPA-MP7 Surface <0.005 0.27 0.006 0.02 <0.1

10m <0.005 0.28 0.007 0.02 <0.1

Bottom <0.005 0.25 0.007 0.02 <0.1

Int (12m)

0.6

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 48

15. November 2018

15.1 Dissolved oxygen

15.2 Salinity

EPA Tasmania, April 2020 49

15.3 Temperature

EPA Tasmania, April 2020 50

15.4 Nutrients November 2018 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.28 0.004 0.02 <0.1

10m 0.006 0.28 0.007 0.02 <0.1

Bottom 0.011 0.25 0.008 0.02 <0.1

Int (12m)

1.9

EPA-MP3 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.22 0.004 0.02 <0.1

Bottom 0.009 0.26 0.008 0.02 <0.1

Int (12m)

1.4

EPA-MP4 Surface <0.005 0.33 0.004 0.02 <0.1

10m <0.005 0.27 0.004 0.02 <0.1

Bottom <0.005 0.31 0.005 0.02 <0.1

Int (12m)

1.7

EPA-MP5 Surface <0.005 0.25 0.004 0.02 <0.1

10m <0.005 0.27 0.004 0.02 <0.1

Bottom <0.005 0.25 0.006 0.02 <0.1

Int (12m)

1.5

EPA-MP6 Surface <0.005 0.21 0.004 0.02 <0.1

10m <0.005 0.23 0.004 0.02 <0.1

Bottom 0.009 0.28 0.008 0.03 0.1

Int (12m)

1.6

EPA-MP7 Surface <0.005 0.25 0.004 0.02 <0.1

10m <0.005 0.29 0.009 0.02 <0.1

Bottom <0.005 0.33 0.005 0.02 <0.1

Int (12m)

1.6

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 51

16. December 2018

16.1 Dissolved oxygen

16.2 Salinity

EPA Tasmania, April 2020 52

16.3 Temperature

EPA Tasmania, April 2020 53

16.4 Nutrients December 2018 TAN

(mg/L) Nitrogen Total (mg/L)*

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)*

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.23 0.004 0.02 <0.1

10m <0.005 0.25 0.004 0.02 0.1

Bottom <0.005 0.27 0.005 0.03 0.1

Int (12m)

2.8

EPA-MP3 Surface <0.005 0.30 0.003 0.02 <0.1

10m <0.005 0.23 <0.003 0.02 <0.1

Bottom 0.005 0.25 0.008 0.02 0.1

Int (12m)

1.4

EPA-MP4 Surface <0.005 0.22 0.004 0.02 <0.1

10m <0.005 0.25 0.003 0.02 <0.1

Bottom <0.005 0.25 0.009 0.02 0.1

Int (12m)

2.3

EPA-MP5 Surface <0.005 0.23 <0.003 0.02 <0.1

10m <0.005 0.22 <0.003 0.02 <0.1

Bottom <0.005 0.24 0.008 0.02 0.1

Int (12m)

1.3

EPA-MP6 Surface <0.005 0.23 0.003 0.02 <0.1

10m <0.005 0.24 0.004 0.02 <0.1

Bottom <0.005 0.23 0.005 0.03 0.1

Int (12m)

1.0

EPA-MP7 Surface <0.005 0.24 0.003 0.02 <0.1

10m <0.005 0.25 0.003 0.02 0.1

Bottom <0.005 0.28 0.005 0.02 0.1

Int (12m)

1.4

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a * = sample holding time could not be assessed at time of testing and this should be taken to account when interpreting results (assessment made against AS/NZS 5667).

EPA Tasmania, April 2020 54

17. January 2019

17.1 Dissolved oxygen

17.2 Salinity

EPA Tasmania, April 2020 55

17.3 Temperature

EPA Tasmania, April 2020 56

17.4 Nutrients January 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.25 0.004 0.02 <0.1

10m <0.005 0.27 0.005 0.03 <0.1

Bottom <0.005 0.26 0.005 0.03 <0.1

Int (12m)

1.8

EPA-MP3 Surface <0.005 0.23 0.003 0.02 <0.1

10m <0.005 0.24 0.004 0.02 <0.1

Bottom 0.015 0.27 0.011 0.03 0.1

Int (12m)

<0.5

EPA-MP4 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.24 <0.003 0.02 <0.1

Bottom 0.011 0.26 0.009 0.03 0.1

Int (12m)

0.8

EPA-MP5 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.25 <0.003 0.02 <0.1

Bottom 0.008 0.25 0.006 0.02 <0.1

Int (12m)

0.7

EPA-MP6 Surface <0.005 0.24 0.003 0.02 <0.1

10m <0.005 0.25 0.003 0.02 <0.1

Bottom <0.005 0.25 0.005 0.03 <0.1

Int (12m)

1.0

EPA-MP7 Surface <0.005 0.25 0.004 0.02 <0.1

10m <0.005 0.28 0.004 0.02 <0.1

Bottom <0.005 0.25 0.005 0.02 <0.1

Int (12m)

1.2

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 57

18. February 2019

18.1 Dissolved oxygen

18.2 Salinity

EPA Tasmania, April 2020 58

18.3 Temperature

EPA Tasmania, April 2020 59

18.4 Nutrients February 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.22 0.004 0.02 <0.1

Bottom <0.005 0.22 0.006 0.02 <0.1

Int (12m)

0.9

EPA-MP3 Surface <0.005 0.21 0.005 0.02 <0.1

10m <0.005 0.21 0.005 0.02 <0.1

Bottom <0.005 0.22 0.010 0.02 0.2

Int (12m)

<0.5

EPA-MP4 Surface <0.005 0.22 0.004 0.02 <0.1

10m <0.005 0.23 0.004 0.02 <0.1

Bottom <0.005 0.22 0.005 0.02 <0.1

Int (12m)

<0.5

EPA-MP5 Surface <0.005 0.22 0.004 0.02 <0.1

10m <0.005 0.22 0.004 0.02 <0.1

Bottom <0.005 0.24 0.007 0.02 <0.1

Int (12m)

<0.5

EPA-MP6 Surface <0.005 0.23 0.005 0.02 <0.1

10m <0.005 0.21 0.004 0.02 <0.1

Bottom <0.005 0.22 0.004 0.02 <0.1

Int (12m)

0.6

EPA-MP7 Surface <0.005 0.23 0.005 0.02 <0.1

10m <0.005 0.23 0.005 0.02 <0.1

Bottom <0.005 0.22 0.004 0.02 <0.1

Int (12m)

0.6

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 60

19. March 2019

19.1 Dissolved oxygen

19.2 Salinity

EPA Tasmania, April 2020 61

19.3 Temperature

EPA Tasmania, April 2020 62

19.4 Nutrients March 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.24 0.005 0.02 <0.1

10m <0.005 0.28 0.004 0.02 <0.1

Bottom <0.005 0.23 0.005 0.02 <0.1

Int (12m)

1.0

EPA-MP3 Surface <0.005 0.23 0.004 0.02 <0.1

10m <0.005 0.23 0.004 0.02 <0.1

Bottom <0.005 0.27 0.013 0.03 0.2

Int (12m)

2.9

EPA-MP4 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.24 0.004 0.02 <0.1

Bottom 0.005 0.29 0.014 0.03 0.2

Int (12m)

1.2

EPA-MP5 Surface <0.005 0.22 0.003 0.02 <0.1

10m <0.005 0.24 0.004 0.02 <0.1

Bottom 0.011 0.27 0.012 0.03 0.2

Int (12m)

0.5

EPA-MP6 Surface <0.005 0.24 0.004 0.02 <0.1

10m <0.005 0.24 0.004 0.02 <0.1

Bottom 0.006 0.24 0.007 0.02 <0.1

Int (12m)

0.5

EPA-MP7 Surface <0.005 0.25 0.005 0.02 <0.1

10m <0.005 0.27 0.005 0.02 <0.1

Bottom <0.005 0.24 0.005 0.02 <0.1

Int (12m)

0.8

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 63

20. April 2019

20.1 Dissolved oxygen

20.2 Salinity

EPA Tasmania, April 2020 64

20.3 Temperature

EPA Tasmania, April 2020 65

20.4 Nutrients April 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.30 0.006 0.02 <0.1

10m <0.005 0.31 0.006 0.03 <0.1

Bottom <0.005 0.28 0.006 0.03 <0.1

Int (12m)

1.1

EPA-MP3 Surface <0.005 0.25 0.005 0.02 <0.1

10m <0.005 0.24 0.006 0.02 <0.1

Bottom <0.005 0.27 0.006 0.02 <0.1

Int (12m)

0.9

EPA-MP4 Surface <0.005 0.25 0.006 0.02 <0.1

10m <0.005 0.27 0.006 0.02 <0.1

Bottom <0.005 0.28 0.005 0.02 <0.1

Int (12m)

0.7

EPA-MP5 Surface <0.005 0.26 0.006 0.02 <0.1

10m <0.005 0.27 0.005 0.03 <0.1

Bottom <0.005 0.25 0.006 0.02 <0.1

Int (12m)

0.8

EPA-MP6 Surface <0.005 0.25 0.006 0.02 <0.1

10m <0.005 0.26 0.006 0.02 <0.1

Bottom <0.005 0.24 0.007 0.02 <0.1

Int (12m)

1.6

EPA-MP7 Surface 0.019 0.32 0.009 0.03 <0.1

10m 0.010 0.32 0.007 0.03 <0.1

Bottom <0.005 0.30 0.008 0.02 <0.1

Int (12m)

1.3

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 66

21. May 2019

21.1 Dissolved oxygen

21.2 Salinity

EPA Tasmania, April 2020 67

21.3 Temperature

EPA Tasmania, April 2020 68

21.4 Nutrients May 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.007 0.27 0.006 0.03 0.1

10m <0.005 0.27 0.006 0.02 0.1

Bottom <0.005 0.28 0.007 0.03 0.1

Int (12m)

0.9

EPA-MP3 Surface <0.005 0.26 0.007 0.02 0.1

10m <0.005 0.26 0.007 0.02 0.1

Bottom 0.010 0.26 0.007 0.02 0.1

Int (12m)

0.8

EPA-MP4 Surface <0.005 0.26 0.008 0.02 0.1

10m <0.005 0.26 0.007 0.02 0.1

Bottom 0.013 0.28 0.009 0.02 0.1

Int (12m)

0.8

EPA-MP5 Surface <0.005 0.26 0.006 0.02 0.1

10m <0.005 0.25 0.006 0.02 0.1

Bottom <0.005 0.26 0.006 0.02 0.1

Int (12m)

0.9

EPA-MP6 Surface <0.005 0.26 0.006 0.02 0.1

10m <0.005 0.26 0.006 0.02 0.1

Bottom <0.005 0.27 0.008 0.03 0.2

Int (12m)

1.0

EPA-MP7 Surface <0.005 0.24 0.006 0.02 0.1

10m <0.005 0.29 0.006 0.02 0.1

Bottom <0.005 0.27 0.007 0.02 0.1

Int (12m)

0.9

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 69

22. June 2019

22.1 Dissolved oxygen

22.2 Salinity

EPA Tasmania, April 2020 70

22.3 Temperature

EPA Tasmania, April 2020 71

22.4 Nutrients June 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.008 0.30 0.009 0.02 0.1

10m 0.005 0.28 0.008 0.02 0.1

Bottom 0.005 0.28 0.007 0.02 0.1

Int (12m)

1.0

EPA-MP3 Surface <0.005 0.29 0.009 0.03 0.1

10m <0.005 0.30 0.008 0.02 <0.1

Bottom <0.005 0.28 0.008 0.02 0.1

Int (12m)

0.8

EPA-MP4 Surface <0.005 0.28 0.008 0.02 <0.1

10m <0.005 0.30 0.007 0.02 <0.1

Bottom <0.005 0.27 0.008 0.02 <0.1

Int (12m)

0.9

EPA-MP5 Surface <0.005 0.31 0.009 0.03 <0.1

10m <0.005 0.29 0.010 0.02 <0.1

Bottom 0.005 0.29 0.010 0.02 0.1

Int (12m)

0.9

EPA-MP6 Surface <0.005 0.30 0.009 0.03 <0.1

10m <0.005 0.30 0.008 0.02 <0.1

Bottom <0.005 0.28 0.008 0.02 0.1

Int (12m)

1.0

EPA-MP7 Surface <0.005 0.30 0.008 0.03 0.1

10m <0.005 0.33 0.008 0.02 0.1

Bottom <0.005 0.31 0.007 0.02 <0.1

Int (12m)

1.1

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 72

23. July 2019

23.1 Dissolved oxygen

23.2 Salinity

EPA Tasmania, April 2020 73

23.3 Temperature

EPA Tasmania, April 2020 74

23.4 Nutrients July 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface 0.016 0.32 0.013 0.03 0.1

10m 0.013 0.31 0.012 0.03 0.1

Bottom 0.013 0.29 0.012 0.03 0.1

Int (12m)

0.6

EPA-MP3 Surface 0.008 0.31 0.011 0.03 0.1

10m 0.008 0.30 0.012 0.03 0.1

Bottom 0.012 0.30 0.011 0.02 0.1

Int (12m)

<0.5

EPA-MP4 Surface 0.007 0.30 0.006 0.03 0.1

10m 0.007 0.31 0.013 0.03 0.1

Bottom 0.011 0.28 0.011 0.02 0.1

Int (12m)

0.5

EPA-MP5 Surface 0.009 0.29 0.011 0.03 0.1

10m 0.010 0.30 0.011 0.03 0.1

Bottom 0.012 0.30 0.011 0.03 0.1

Int (12m)

0.5

EPA-MP6 Surface 0.010 0.29 0.010 0.03 0.1

10m 0.010 0.29 0.011 0.03 0.1

Bottom 0.011 0.30 0.011 0.03 0.1

Int (12m)

0.6

EPA-MP7 Surface 0.023 0.33 0.013 0.03 0.1

10m 0.021 0.32 0.013 0.03 0.1

Bottom 0.010 0.31 0.011 0.03 0.1

Int (12m)

0.6

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 75

24. August 2019

24.1 Dissolved oxygen

24.2 Salinity

EPA Tasmania, April 2020 76

24.3 Temperature

EPA Tasmania, April 2020 77

24.4 Nutrients August 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.26 0.005 0.02 <0.1

10m <0.005 0.26 0.006 0.02 <0.1

Bottom <0.005 0.26 0.006 0.02 <0.1

Int (12m)

2.7

EPA-MP3 Surface <0.005 0.27 0.009 0.03 <0.1

10m <0.005 0.26 0.009 0.02 <0.1

Bottom 0.009 0.26 0.009 0.03 0.1

Int (12m)

1.7

EPA-MP4 Surface <0.005 0.27 0.008 0.03 <0.1

10m <0.005 0.27 0.009 0.03 <0.1

Bottom 0.008 0.27 0.009 0.02 <0.1

Int (12m)

2.1

EPA-MP5 Surface <0.005 0.26 0.008 0.03 <0.1

10m <0.005 0.28 0.009 0.03 <0.1

Bottom <0.005 0.26 0.006 0.03 <0.1

Int (12m)

2.3

EPA-MP6 Surface <0.005 0.26 0.007 0.03 <0.1

10m <0.005 0.26 0.006 0.02 <0.1

Bottom 0.005 0.26 0.006 0.02 <0.1

Int (12m)

3.0

EPA-MP7 Surface 0.005 0.26 0.007 0.02 <0.1

10m <0.005 0.27 0.007 0.02 <0.1

Bottom 0.005 0.28 0.006 0.02 <0.1

Int (12m)

2.4

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 78

25. September 2019

25.1 Dissolved oxygen

25.2 Salinity

EPA Tasmania, April 2020 79

25.3 Temperature

EPA Tasmania, April 2020 80

25.4 Nutrients September 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.24 0.004 0.020 <0.1

10m 0.005 0.25 0.004 0.024 <0.1

Bottom <0.005 0.23 0.004 0.019 0.1

Int (12m)

1.2

EPA-MP3 Surface <0.005 0.28 0.011 0.026 0.1

10m <0.005 0.28 0.010 0.027 0.1

Bottom 0.006 0.24 0.006 0.021 0.1

Int (12m)

0.8

EPA-MP4 Surface <0.005 0.25 0.005 0.022 <0.1

10m <0.005 0.25 0.004 0.020 <0.1

Bottom 0.006 0.24 0.005 0.020 0.1

Int (12m)

1.2

EPA-MP5 Surface <0.005 0.27 0.008 0.024 0.1

10m <0.005 0.28 0.008 0.025 0.1

Bottom 0.006 0.25 0.005 0.020 0.1

Int (12m)

0.9

EPA-MP6 Surface <0.005 0.24 0.005 0.021 <0.1

10m <0.005 0.24 0.005 0.023 <0.1

Bottom <0.005 0.26 0.005 0.023 <0.1

Int (12m)

1.8

EPA-MP7 Surface <0.005 0.23 0.005 0.017 <0.1

10m <0.005 0.26 0.005 0.023 <0.1

Bottom <0.005 0.24 0.005 0.019 <0.1

Int (12m)

1.2

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

EPA Tasmania, April 2020 81

26. December 2019

26.1 Dissolved oxygen

26.2 Salinity

EPA Tasmania, April 2020 82

26.3 Temperature

EPA Tasmania, April 2020 83

26.4 Nutrients December 2019 TAN

(mg/L) Nitrogen Total (mg/L)

Phosphorus Dissolved Reactive (mg/L)

Phosphorus Total (mg/L)

Silica, Molybdate Reactive (mg/L)

Chla (mg/m3)

EPA-MP2 Surface <0.005 0.21 0.004 0.031 <0.1

10m 0.007 0.22 0.004 0.033 <0.1

Bottom 0.005 0.20 0.004 0.031 <0.1

Int (12m)

0.7

EPA-MP3 Surface <0.005 0.19 0.004 0.029 <0.1

10m <0.005 0.20 <0.003 0.027 <0.1

Bottom <0.005 0.20 0.006 0.035 0.1

Int (12m)

<0.5

EPA-MP4 Surface <0.005 0.21 <0.003 0.032 <0.1

10m 0.007 0.20 0.003 0.030 <0.1

Bottom <0.005 0.22 0.003 0.034 <0.1

Int (12m)

<0.5

EPA-MP5 Surface <0.005 0.20 0.004 0.029 <0.1

10m <0.005 0.21 <0.003 0.032 <0.1

Bottom <0.005 0.21 <0.003 0.034 <0.1

Int (12m)

<0.5

EPA-MP6 Surface <0.005 0.21 0.005 0.029 <0.1

10m <0.005 0.21 0.004 0.030 <0.1

Bottom <0.005 0.21 0.004 0.031 <0.1

Int (12m)

<0.5

EPA-MP7 Surface <0.005 0.20 0.004 0.028 <0.1

10m <0.005 0.21 0.003 0.030 <0.1

Bottom <0.005 0.21 <0.003 0.028 <0.1

Int (12m)

<0.5

< = below limit of reporting, TAN = Total Ammonia Nitrogen, Chla = Chlorophyll a

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