Browse state water-system results

Explore PFAS drinking-water results by state

Browse active community water systems with complete UCMR 5 monitoring. Each state page counts every water system once.

56 jurisdictionsUnit community water systemRelease ucmr5-2026-01-15-analysis-v0.2Updated 2026-09-05

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These percentages summarize water systems, not ZIP codes or households.

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Read this correctly“Study comparison level” means the dated EPA technical cutoff used in this January 2026 research release. These percentages do not determine household exposure, health risk, or current legal compliance.

Northeast

9 pages

Connecticut

45.9%of systems with complete monitoring reaching a study comparison level

28 of 61 systemsView systems

Maine

5.9%of systems with complete monitoring reaching a study comparison level

2 of 34 systemsView systems

Massachusetts

26.9%of systems with complete monitoring reaching a study comparison level

67 of 249 systemsView systems

New Hampshire

17.4%of systems with complete monitoring reaching a study comparison level

8 of 46 systemsView systems

New Jersey

45.7%of systems with complete monitoring reaching a study comparison level

105 of 230 systemsView systems

New York

10.2%of systems with complete monitoring reaching a study comparison level

30 of 293 systemsView systems

Pennsylvania

24.5%of systems with complete monitoring reaching a study comparison level

81 of 331 systemsView systems

Rhode Island

29.2%of systems with complete monitoring reaching a study comparison level

7 of 24 systemsView systems

Vermont

0.0%of systems with complete monitoring reaching a study comparison level

0 of 30 systemsView systems

Midwest

12 pages

Illinois

3.0%of systems with complete monitoring reaching a study comparison level

13 of 436 systemsView systems

Indiana

2.9%of systems with complete monitoring reaching a study comparison level

6 of 208 systemsView systems

Iowa

0.8%of systems with complete monitoring reaching a study comparison level

1 of 132 systemsView systems

Kansas

2.2%of systems with complete monitoring reaching a study comparison level

2 of 89 systemsView systems

Michigan

1.7%of systems with complete monitoring reaching a study comparison level

5 of 291 systemsView systems

Minnesota

5.6%of systems with complete monitoring reaching a study comparison level

10 of 178 systemsView systems

Missouri

2.4%of systems with complete monitoring reaching a study comparison level

5 of 205 systemsView systems

Nebraska

6.5%of systems with complete monitoring reaching a study comparison level

3 of 46 systemsView systems

North Dakota

0.0%of systems with complete monitoring reaching a study comparison level

0 of 36 systemsView systems

Ohio

9.7%of systems with complete monitoring reaching a study comparison level

29 of 300 systemsView systems

South Dakota

0.0%of systems with complete monitoring reaching a study comparison level

0 of 52 systemsView systems

Wisconsin

9.8%of systems with complete monitoring reaching a study comparison level

17 of 174 systemsView systems

South

17 pages

Alabama

19.2%of systems with complete monitoring reaching a study comparison level

53 of 276 systemsView systems

Arkansas

0.0%of systems with complete monitoring reaching a study comparison level

0 of 148 systemsView systems

Delaware

34.3%of systems with complete monitoring reaching a study comparison level

12 of 35 systemsView systems

District of Columbia

0.0%of systems with complete monitoring reaching a study comparison level

0 of 3 systemsView systems

Florida

33.2%of systems with complete monitoring reaching a study comparison level

122 of 367 systemsView systems

Georgia

11.4%of systems with complete monitoring reaching a study comparison level

27 of 237 systemsView systems

Kentucky

4.4%of systems with complete monitoring reaching a study comparison level

9 of 205 systemsView systems

Louisiana

0.0%of systems with complete monitoring reaching a study comparison level

0 of 238 systemsView systems

Maryland

16.9%of systems with complete monitoring reaching a study comparison level

12 of 71 systemsView systems

Mississippi

1.9%of systems with complete monitoring reaching a study comparison level

4 of 209 systemsView systems

North Carolina

24.0%of systems with complete monitoring reaching a study comparison level

61 of 254 systemsView systems

Oklahoma

5.1%of systems with complete monitoring reaching a study comparison level

7 of 136 systemsView systems

South Carolina

32.3%of systems with complete monitoring reaching a study comparison level

43 of 133 systemsView systems

Tennessee

6.3%of systems with complete monitoring reaching a study comparison level

15 of 238 systemsView systems

Texas

2.6%of systems with complete monitoring reaching a study comparison level

25 of 954 systemsView systems

Virginia

7.5%of systems with complete monitoring reaching a study comparison level

11 of 146 systemsView systems

West Virginia

11.4%of systems with complete monitoring reaching a study comparison level

10 of 88 systemsView systems

West

13 pages

Alaska

9.1%of systems with complete monitoring reaching a study comparison level

2 of 22 systemsView systems

Arizona

13.9%of systems with complete monitoring reaching a study comparison level

21 of 151 systemsView systems

California

19.3%of systems with complete monitoring reaching a study comparison level

120 of 623 systemsView systems

Colorado

2.9%of systems with complete monitoring reaching a study comparison level

4 of 136 systemsView systems

Hawaii

0.0%of systems with complete monitoring reaching a study comparison level

0 of 41 systemsView systems

Idaho

3.7%of systems with complete monitoring reaching a study comparison level

2 of 54 systemsView systems

Montana

0.0%of systems with complete monitoring reaching a study comparison level

0 of 34 systemsView systems

Nevada

8.8%of systems with complete monitoring reaching a study comparison level

3 of 34 systemsView systems

New Mexico

1.4%of systems with complete monitoring reaching a study comparison level

1 of 74 systemsView systems

Oregon

8.0%of systems with complete monitoring reaching a study comparison level

9 of 113 systemsView systems

Utah

1.7%of systems with complete monitoring reaching a study comparison level

2 of 120 systemsView systems

Washington

8.3%of systems with complete monitoring reaching a study comparison level

19 of 229 systemsView systems

Wyoming

3.6%of systems with complete monitoring reaching a study comparison level

1 of 28 systemsView systems

Territories

5 pages

American Samoa

0.0%of systems with complete monitoring reaching a study comparison level

0 of 1 systemsView systems

Guam

33.3%of systems with complete monitoring reaching a study comparison level

1 of 3 systemsView systems

Northern Mariana Islands

100.0%of systems with complete monitoring reaching a study comparison level

1 of 1 systemsView systems

Puerto Rico

16.1%of systems with complete monitoring reaching a study comparison level

14 of 87 systemsView systems

U.S. Virgin Islands

0.0%of systems with complete monitoring reaching a study comparison level

0 of 2 systemsView systems