Lead map

Lead action-level violations, by state

Community water systems with a Lead & Copper Rule treatment-technique (action-level) violation in EPA's records. Darker states have more systems that exceeded the lead action level or failed required corrosion-control treatment.

Alaska: 24 systems with lead action-level violations of 405 AK 24 Alabama: 6 systems with lead action-level violations of 545 AL 6 Arkansas: 53 systems with lead action-level violations of 666 AR 53 Arizona: 20 systems with lead action-level violations of 954 AZ 20 California: 34 systems with lead action-level violations of 3,071 CA 34 Colorado: 72 systems with lead action-level violations of 1,113 CO 72 Connecticut: 75 systems with lead action-level violations of 504 CT 75 District of Columbia: 2 systems with lead action-level violations of 12 DC 2 Delaware: 2 systems with lead action-level violations of 209 DE 2 Florida: 28 systems with lead action-level violations of 1,516 FL 28 Georgia: 12 systems with lead action-level violations of 1,718 GA 12 Hawaii: 2 systems with lead action-level violations of 117 HI 2 Iowa: 6 systems with lead action-level violations of 1,078 IA 6 Idaho: 25 systems with lead action-level violations of 774 ID 25 Illinois: 393 systems with lead action-level violations of 1,785 IL 393 Indiana: 92 systems with lead action-level violations of 718 IN 92 Kansas: 102 systems with lead action-level violations of 856 KS 102 Kentucky: 0 systems with lead action-level violations of 375 KY 0 Louisiana: 43 systems with lead action-level violations of 819 LA 43 Massachusetts: 123 systems with lead action-level violations of 559 MA 123 Maryland: 71 systems with lead action-level violations of 467 MD 71 Maine: 81 systems with lead action-level violations of 359 ME 81 Michigan: 81 systems with lead action-level violations of 1,429 MI 81 Minnesota: 13 systems with lead action-level violations of 995 MN 13 Missouri: 22 systems with lead action-level violations of 1,679 MO 22 Mississippi: 6 systems with lead action-level violations of 990 MS 6 Montana: 38 systems with lead action-level violations of 813 MT 38 North Carolina: 283 systems with lead action-level violations of 1,963 NC 283 North Dakota: 30 systems with lead action-level violations of 318 ND 30 Nebraska: 59 systems with lead action-level violations of 594 NE 59 New Hampshire: 140 systems with lead action-level violations of 677 NH 140 New Jersey: 101 systems with lead action-level violations of 620 NJ 101 New Mexico: 2 systems with lead action-level violations of 592 NM 2 Nevada: 7 systems with lead action-level violations of 232 NV 7 New York: 103 systems with lead action-level violations of 2,202 NY 103 Ohio: 74 systems with lead action-level violations of 1,130 OH 74 Oklahoma: 28 systems with lead action-level violations of 884 OK 28 Oregon: 127 systems with lead action-level violations of 941 OR 127 Pennsylvania: 145 systems with lead action-level violations of 1,782 PA 145 Rhode Island: 20 systems with lead action-level violations of 93 RI 20 South Carolina: 67 systems with lead action-level violations of 557 SC 67 South Dakota: 10 systems with lead action-level violations of 513 SD 10 Tennessee: 11 systems with lead action-level violations of 453 TN 11 Texas: 230 systems with lead action-level violations of 4,617 TX 230 Utah: 11 systems with lead action-level violations of 560 UT 11 Virginia: 62 systems with lead action-level violations of 1,052 VA 62 Vermont: 50 systems with lead action-level violations of 377 VT 50 Washington: 27 systems with lead action-level violations of 2,403 WA 27 Wisconsin: 116 systems with lead action-level violations of 977 WI 116 West Virginia: 24 systems with lead action-level violations of 430 WV 24 Wyoming: 14 systems with lead action-level violations of 317 WY 14
None reported · 0
Lower · 1–12
13–34
35–81
Higher · 82–393

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.

3,177
systems with a lead action-level violation nationwide
49,279
community water systems tracked
52
states/territories with at least one

States with the most

State systems with a lead action-level violation Share of community systems
Illinois 393 / 1,785 22%
North Carolina 283 / 1,963 14.4%
Texas 230 / 4,617 5%
Pennsylvania 145 / 1,782 8.1%
New Hampshire 140 / 677 20.7%
Oregon 127 / 941 13.5%
Massachusetts 123 / 559 22%
Wisconsin 116 / 977 11.9%
New York 103 / 2,202 4.7%
Kansas 102 / 856 11.9%
New Jersey 101 / 620 16.3%
Indiana 92 / 718 12.8%
Maine 81 / 359 22.6%
Michigan 81 / 1,429 5.7%
Connecticut 75 / 504 14.9%
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How to read this. Counts are public water systems, not people, and reflect EPA SDWIS / ECHO — Lead & Copper Rule — a snapshot of reported data, not a live measurement of any single tap. Many lead violations are resolved after corrosion-control treatment; a count here is historical and not a current safety verdict. Color bins are quantiles, so shading shows relative rank. Always confirm with your utility's Consumer Confidence Report. Source: EPA SDWIS / ECHO — Lead & Copper Rule.