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Table 16: Over 1,000 water systems serving 12.4 million people have at least one water source polluted with nitrate at concentra

Pouring It On: Table 16: Over 1,000 water systems serving 12.4 million people have at least one water source polluted with nitrate at concentra

February 1, 1996
State Number of water systems with sources exceeding the federal nitrate standard Population Affected
Arizona 75 1,951,730
California 139 8,701,240
Colorado 32 83,849
Delaware 60 12,759
Illinois 27 18,797
Iowa 56 90,160
Kansas 67 93,049
Maryland 45 28,962
Michigan 6 3,442
Minnesota 15 27,098
Montana 5 270
Nebraska 118 107,027
Ohio 13 100,650
Oregon 24 6,642
Pennsylvania 112 220,796
South Dakota 8 1,914
Tennessee 2 760
Texas 114 734,478
Washington 126 104,329
Wisconsin 9 88,722
Total 1,053 12,376,674

Source: State drinking water agency nitrate monitoring database. Compiled by Environmental Working Group.