PFAS in North Dakota tap water

0 of 38 tested systems measured above the federal limit. 7 had a detection of any kind.

Every public water system below was required by the EPA to test for 29 PFAS compounds. Sorted by the highest PFOA or PFOS reading, worst first. Find yours for the full set of readings and what removes them.

Water system	Highest PFOA	Highest PFOS	Found	Against the 4 ppt limit
Agassiz Water Users District	none detected	none detected	0 of 29	Within
Barnes Rural Water District	none detected	none detected	0 of 29	Within
Beach City of	none detected	none detected	0 of 29	Within
Beulah City of	none detected	none detected	0 of 29	Within
Bismarck City of	none detected	none detected	0 of 29	Within
Cass Rural Water District Fargo	none detected	none detected	1 of 29	Within
Cass Rural Water District-phase I	none detected	none detected	0 of 29	Within
Cass Rural Water District-phase II	none detected	none detected	0 of 29	Within
Central Plains Water District	none detected	none detected	1 of 29	Within
Devils Lake City of	none detected	none detected	0 of 29	Within
Dickinson City of	none detected	none detected	0 of 29	Within
East Central Regional Wd-gf	none detected	none detected	0 of 29	Within
Fargo City of	none detected	none detected	0 of 29	Within
Grafton City of	none detected	none detected	1 of 29	Within
Grand Forks Regional WTP	none detected	none detected	1 of 29	Within
Greater Ramsey Water District	none detected	none detected	0 of 29	Within
Grenora City of	none detected	none detected	0 of 29	Within
Jamestown City of	none detected	none detected	0 of 29	Within
Larimore City of	none detected	none detected	0 of 29	Within
Lincoln City of	none detected	none detected	0 of 29	Within
Mandan City of	none detected	none detected	0 of 29	Within
Minot City of	none detected	none detected	0 of 29	Within
Missouri West Water System	none detected	none detected	0 of 29	Within
North Prairie Rwd-system 1&2	none detected	none detected	1 of 29	Within
Northeast Rwd- North Valley Branch	none detected	none detected	0 of 29	Within
Northwest Rural Water District, Nd	none detected	none detected	1 of 29	Within
Omnd Water Treatment Plant	none detected	none detected	0 of 29	Within
South Central Regional Water District	none detected	none detected	1 of 29	Within
South Central Rwd North Burleigh	none detected	none detected	0 of 29	Within
South Central Rwd-emmons	none detected	none detected	0 of 29	Within
Southeast Wud (east)	none detected	none detected	0 of 29	Within
Southwest Water Authority	none detected	none detected	0 of 29	Within
Stutsman Rural Water District	none detected	none detected	0 of 29	Within
Valley City City of	none detected	none detected	0 of 29	Within
Wahpeton City of	none detected	none detected	0 of 29	Within
Watford City City of	none detected	none detected	0 of 29	Within
West Fargo City of	none detected	none detected	0 of 29	Within
Williston City of	none detected	none detected	0 of 29	Within

All 38 systems the EPA tested in North Dakota, every one of them with its own page. Each was tested for 29 PFAS compounds.

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Source, the EPA’s fifth Unregulated Contaminant Monitoring Rule, final dataset published 2026-10-15. Original data →