OZONE Monitoring Network

2015 Annual AQ Monitoring Meeting

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION

Protecting Maine’s Air, Land and Water

Tom Downs, CCMChief Meteorologisttom.downs@maine.gov

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Current Ozone Monitoring Network

0

50

100

150

200

AIR

QUALITY

INDEX

2014 Maximum Daily Air Quality Levels due to Ozone in Maine

UNHEALTHY

GOOD

MODERATE

UNHEALTHY FOR SENSITIVE GROUPS

Data is preliminary

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Meteorological conditions conducive (warmer and drier than normal in the midwest)

to ozone production and transport into the Ozone

Transport Region

Wet summer in Maine

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Meteorological conditions not conducive to ozone production and transport into the Ozone

Transport RegionTemperatures conducive to ozone production in the northern part (NYC to Maine) of the OTR however it was a wet summer in the East.

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Meteorological conditions not conducive to ozone

production and transport into the Ozone Transport Region

Another wet

summer in Maine

Transport temperatures

below normal in the Midwest and core of the OTR

Cooler than normal except

in eastern areas of the OTR

0.055

0.060

0.065

0.070

0.075

0.080

0.085

0.090

0.095

0.100

0.105

0.110

0.115

0.12019

83-8

5

1984

-86

1985

-87

1986

-88

1987

-89

1988

-90

1989

-91

1990

-92

1991

-93

1992

-94

1993

-95

1994

-96

1995

-97

1996

-98

1997

-99

1998

-00

1999

-01

2000

-02

2001

-03

2002

-04

2003

-05

2004

-06

2005

-07

2006

-08

2007

-09

2008

-10

2009

-11

2010

-12

2011

-13

2012

-14

8-H

R O

ZO

NE

DE

SIG

N V

AL

UE

(pp

m)

3-YEAR PERIOD

MAINE 8-HOUR OZONE DESIGN VALUE TRENDS (only sites with 2012-14 DV > 60 ppb)

Kennebunkport

Cape Elizabeth

Cadillac

Port Clyde

McFarland Hill

Gardiner

Shapleigh

West Buxton

Durham

Portland

NAAQS

Created by Tom Downs, Maine DEP-BAQ - 1/7/2015

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

-0.015

-0.010

-0.005

0.000

0.005

0.010

0.015

0.020

0.025

0.030

0.0357/

17/2

014

7/24

/201

4

7/31

/201

4

8/7/

2014

8/14

/201

4

8/21

/201

4

8/28

/201

4

9/4/

2014

9/11

/201

4

9/18

/201

4

9/25

/201

4

10/2

/201

4

10/9

/201

4

10/1

6/20

14

10/2

3/20

14

10/3

0/20

14

11/6

/201

4

11/1

3/20

14

11/2

0/20

14

11/2

7/20

14

12/4

/201

4

12/1

1/20

14

12/1

8/20

14

12/2

5/20

14

1/1/

2015

1/8/

2015

1/15

/201

5

1/22

/201

5

1/29

/201

5

2/5/

2015

2/12

/201

5

2/19

/201

5

2/26

/201

5

PPM

NOAA's AQFS CMAQ V4.6.3 EXPERIMENTAL MODEL OZONE PREDICTIONS vs. OBSERVATIONS FOR SITES IN MAINE

CETL MOD - OBS O3

MCF MOD - OBS O3

Significant changes to the model which became operational

on January 29

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

PROPOSED OZONE STANDARD REVISION

• Final October 1, 2015

• Most likely 65 ppb or 70 ppb for both the primary and secondary 8-hour Ozone NAAQS – with new AQI breakpoints

• Attainment/nonattainment Designations will use 2014-16 data

• Proposed changes to data handling conventions • Only looks at 17 of 24 possible 8-hr running averages to eliminate “double

counting” of exceedances (could miss some exceedances) • For days with less than 75% data recovery rates (< 13 instead of 17 valid 8-

hr averages) the daily maximum 8-hr concentration is valid if it’s greater than the NAAQS.

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

EXAMPLE OF A MISSED EXCEEDANCE OF A 70 PPB NAAQS USING THE PROPOSED DATA HANDLING CONVENTIONS

Only look at 17 of 24 8-hour periods?

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Differences due to proposed data

handling conventions

96

83

92

71

75

83

64

57

42

61

4143

39

29

38

19

32

24

29

23

1714

8

13 13 12 14

10105

97 5 8

34 38

3 4 500

48

12162024283236404448525660646872768084889296

100

2008 2009 2010 2011 2012 2013 2014

NUMBER

OF

DAYS

Number of Moderate and USG AQI Days in Maine due to Ozonefor the current NAAQS and potential future NAAQS

> 49 ppb

> 54 ppb

> 59 ppb

> 65 ppb

> 70 ppb

> 75 ppb

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

MAINE DEPARTMENT OF ENVIRONMENTAL PROTECTION www.maine.gov/dep

Suggested Changes to Ozone Network

Move Bowdoinham site closer to coastline

(Phippsburg/Reid SP?)

Move North Lovell site to a more

exposed (higher elevation) location

www.maine.gov/dep