PlainWater

Water Quality by State

Compare drinking water systems, violations, and PFAS testing across 66 states and territories.

State Systems Population Violations Violation Rate PFAS Tested PFAS Detected
01 5 58,570 814 100% 2 1
02 9 12,762 579 100% 2 0
04 30 69,141 1,215 86.7% 2 0
05 113 144,290 19,546 94.7% 13 5
06 89 196,087 4,905 97.8% 18 15
07 19 14,784 2,342 57.9% 1 1
08 160 144,980 13,068 96.3% 13 10
09 323 555,721 48,296 96.6% 41 30
10 158 142,574 31,953 98.1% 10 2
Alabama 562 6,193,356 40,486 98.6% 306 157
Alaska 1,326 862,218 267,144 97.9% 30 10
American Samoa 91 50,626 1,883 22% 1 1
Arizona 1,493 7,322,166 228,944 98.4% 152 145
Arkansas 1,016 3,049,400 53,437 94.5% 172 57
California 7,249 42,404,883 153,308 89.2% 694 447
Colorado 2,193 7,473,456 238,796 92.6% 163 98
Connecticut 2,332 2,886,005 206,662 94% 63 40
Delaware 460 1,083,630 9,105 74.8% 35 25
District of Columbia 5 667,575 263 100% 3 3
Florida 5,093 22,381,282 184,355 93.2% 402 218
Georgia 2,382 10,694,477 108,966 92.1% 254 102
Guam 8 327,417 203 100% 5 3
Hawaii 137 1,520,931 5,234 80.3% 45 2
Idaho 2,005 1,743,912 104,850 96.1% 60 40
Illinois 5,117 12,576,876 355,322 80.8% 487 199
Indiana 3,967 5,774,616 352,710 95.8% 229 93
Iowa 1,795 3,114,444 138,271 95.2% 152 127
Kansas 957 2,894,673 84,344 99.1% 103 89
Kentucky 424 4,570,541 80,482 99.1% 231 107
Louisiana 1,234 5,316,532 115,060 92.5% 265 218
Maine 1,864 936,624 148,796 93.6% 41 14
Maryland 3,215 6,070,211 60,496 79.9% 83 50
Massachusetts 1,599 10,332,845 73,886 95.2% 263 148
Michigan 10,959 9,098,093 255,201 86.1% 318 87
Minnesota 6,557 5,239,398 59,895 51.6% 196 149
Mississippi 1,185 3,286,781 499,292 96.1% 238 160
Missouri 2,823 5,855,885 201,695 95.4% 230 162
Montana 2,263 1,112,267 297,270 94.7% 45 28
Navajo Nation 170 167,275 29,535 100% 13 13
Nebraska 1,309 1,798,088 49,989 88.9% 53 52
Nevada 589 3,455,285 56,333 92.5% 57 50
New Hampshire 2,453 1,242,123 155,970 90.2% 51 23
New Jersey 3,428 9,570,926 204,988 95% 264 208
New Mexico 1,037 2,027,497 154,522 96.9% 72 70
New York 8,098 19,294,951 552,003 94.4% 332 129
North Carolina 5,020 9,877,724 524,053 92.9% 287 174
North Dakota 368 712,349 13,624 94% 38 34
Northern Mariana Islands 60 70,193 4,377 98.3% 2 1
Ohio 4,181 11,085,226 288,388 90.4% 346 204
Oklahoma 1,262 3,699,452 336,706 98.2% 166 101
Oregon 2,518 4,005,242 206,659 98.5% 125 30
Pennsylvania 7,701 12,630,061 1,159,868 97.1% 389 224
Puerto Rico 458 3,328,141 164,144 99.6% 99 40
Rhode Island 463 1,159,492 33,766 95.9% 29 15
South Carolina 1,390 4,709,324 38,355 65.3% 164 107
South Dakota 654 915,901 56,254 91.6% 49 42
Tennessee 762 7,934,203 43,318 94% 277 93
Texas 7,351 33,253,313 746,210 90.2% 1,147 1,068
US Virgin Islands 256 122,604 1,317 83.6% 3 1
Utah 1,068 3,870,776 169,784 97.6% 129 91
Vermont 1,357 646,999 153,729 93% 37 3
Virginia 2,821 7,911,199 146,670 90% 171 70
Washington 4,557 9,736,844 314,648 92.1% 247 98
West Virginia 774 1,597,057 187,590 99.5% 102 46
Wisconsin 10,988 5,131,439 285,161 72.1% 202 78
Wyoming 766 639,288 32,465 94.5% 33 18