PFAS map

PFAS in U.S. drinking water, by state

Where EPA's UCMR5 program (2023–2025) found PFAS in community water systems above a federal limit. Darker states have more systems with a reading over an EPA PFAS limit.

Alaska: 4 systems above an EPA PFAS limit of 405 AK 4 Alabama: 77 systems above an EPA PFAS limit of 545 AL 77 Arkansas: 1 systems above an EPA PFAS limit of 666 AR 1 Arizona: 24 systems above an EPA PFAS limit of 954 AZ 24 California: 161 systems above an EPA PFAS limit of 3,071 CA 161 Colorado: 13 systems above an EPA PFAS limit of 1,113 CO 13 Connecticut: 37 systems above an EPA PFAS limit of 504 CT 37 District of Columbia: 0 systems above an EPA PFAS limit of 12 DC 0 Delaware: 14 systems above an EPA PFAS limit of 209 DE 14 Florida: 152 systems above an EPA PFAS limit of 1,516 FL 152 Georgia: 42 systems above an EPA PFAS limit of 1,718 GA 42 Hawaii: 0 systems above an EPA PFAS limit of 117 HI 0 Iowa: 8 systems above an EPA PFAS limit of 1,078 IA 8 Idaho: 3 systems above an EPA PFAS limit of 774 ID 3 Illinois: 27 systems above an EPA PFAS limit of 1,785 IL 27 Indiana: 19 systems above an EPA PFAS limit of 718 IN 19 Kansas: 5 systems above an EPA PFAS limit of 856 KS 5 Kentucky: 33 systems above an EPA PFAS limit of 375 KY 33 Louisiana: 7 systems above an EPA PFAS limit of 819 LA 7 Massachusetts: 106 systems above an EPA PFAS limit of 559 MA 106 Maryland: 14 systems above an EPA PFAS limit of 467 MD 14 Maine: 5 systems above an EPA PFAS limit of 359 ME 5 Michigan: 8 systems above an EPA PFAS limit of 1,429 MI 8 Minnesota: 17 systems above an EPA PFAS limit of 995 MN 17 Missouri: 11 systems above an EPA PFAS limit of 1,679 MO 11 Mississippi: 7 systems above an EPA PFAS limit of 990 MS 7 Montana: 2 systems above an EPA PFAS limit of 813 MT 2 North Carolina: 111 systems above an EPA PFAS limit of 1,963 NC 111 North Dakota: 0 systems above an EPA PFAS limit of 318 ND 0 Nebraska: 4 systems above an EPA PFAS limit of 594 NE 4 New Hampshire: 15 systems above an EPA PFAS limit of 677 NH 15 New Jersey: 151 systems above an EPA PFAS limit of 620 NJ 151 New Mexico: 5 systems above an EPA PFAS limit of 592 NM 5 Nevada: 3 systems above an EPA PFAS limit of 232 NV 3 New York: 50 systems above an EPA PFAS limit of 2,202 NY 50 Ohio: 57 systems above an EPA PFAS limit of 1,130 OH 57 Oklahoma: 13 systems above an EPA PFAS limit of 884 OK 13 Oregon: 10 systems above an EPA PFAS limit of 941 OR 10 Pennsylvania: 109 systems above an EPA PFAS limit of 1,782 PA 109 Rhode Island: 9 systems above an EPA PFAS limit of 93 RI 9 South Carolina: 69 systems above an EPA PFAS limit of 557 SC 69 South Dakota: 1 systems above an EPA PFAS limit of 513 SD 1 Tennessee: 38 systems above an EPA PFAS limit of 453 TN 38 Texas: 103 systems above an EPA PFAS limit of 4,617 TX 103 Utah: 4 systems above an EPA PFAS limit of 560 UT 4 Virginia: 18 systems above an EPA PFAS limit of 1,052 VA 18 Vermont: 1 systems above an EPA PFAS limit of 377 VT 1 Washington: 34 systems above an EPA PFAS limit of 2,403 WA 34 Wisconsin: 22 systems above an EPA PFAS limit of 977 WI 22 West Virginia: 20 systems above an EPA PFAS limit of 430 WV 20 Wyoming: 2 systems above an EPA PFAS limit of 317 WY 2
None reported · 0
Lower · 1–5
6–14
15–38
Higher · 39–161

Each square is a state, placed roughly geographically. Tap a state to see its systems and scores. Territories appear in the table below, not the grid.

1,673
systems above an EPA PFAS limit nationwide
3,449
systems with PFAS detected
51
states/territories with at least one

States with the most

State systems above an EPA PFAS limit Share of detecting systems over a limit
California 161 / 234 68.8%
Florida 152 / 185 82.2%
New Jersey 151 / 167 90.4%
North Carolina 111 / 139 79.9%
Pennsylvania 109 / 159 68.6%
Massachusetts 106 / 143 74.1%
Texas 103 / 601 17.1%
Alabama 77 / 115 67%
South Carolina 69 / 91 75.8%
Ohio 57 / 137 41.6%
New York 50 / 94 53.2%
Georgia 42 / 77 54.5%
Tennessee 38 / 87 43.7%
Connecticut 37 / 41 90.2%
Washington 34 / 66 51.5%
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How to read this. Counts are public water systems, not people, and reflect EPA UCMR5 (2023–2025) — a snapshot of reported data, not a live measurement of any single tap. UCMR5 monitored a national sample of mostly larger systems, so a low count can mean less testing, not cleaner water. Color bins are quantiles, so shading shows relative rank. Always confirm with your utility's Consumer Confidence Report. Source: EPA UCMR5 (2023–2025).