44°

46°

70°

68°

EXPLANATIONPercentage exceeding 10 micrograms per liter

Less than or equal to 3.00

3.1 – 9.0

9.1 – 17.0

17.1 – 26.0

26.1 – 35.0

35.1 – 46.0

46.1 – 62.0Fewer than 20 sampled wellsState boundary

Base from USGS and Maine Office of GIS digital line graphs, 2005Projection UTM, Zone 19N, NAD 83Scale 1:24,000

0 30 60 MILES

0 30 60 KILOMETERS

MAINE

Figure B. Percentage of wells in each town with arsenic concentrations greater than 10 micrograms per liter in Maine, 2005–09. Towns shown have 20 or more wells.