PFAS in the Navajo Nation tap water

0 of 13 tested systems measured above the federal limit. 2 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
Chinle-Many Farms-Del Muerto NTUA	none detected	none detected	0 of 29	Within
Crownpoint-Littlewater-Three Mile Point NTUA	none detected	none detected	0 of 29	Within
Dilkon-Indian Wells-Greasewood-White Cone NTUA	none detected	none detected	0 of 29	Within
Farmington Rural-Shiprock-Beclabito NTUA	none detected	none detected	0 of 29	Within
Fort Defiance-Window Rock-St Michaels NTUA	none detected	none detected	0 of 29	Within
Ganado Public Schools	none detected	none detected	0 of 29	Within
Ganado-Burnside-Cornfield-Steamboat NTUA	none detected	none detected	3 of 29	Within
Greasewood Springs Community Boarding School BIA	none detected	none detected	0 of 29	Within
Kayenta NTUA	none detected	none detected	1 of 29	Within
Mariano Lake-Pinedale-Church Rock NTUA	none detected	none detected	0 of 29	Within
Pinon-District 4 NTUA	none detected	none detected	0 of 29	Within
Toadlena NTUA	none detected	none detected	0 of 29	Within
Tuba City NTUA	none detected	none detected	0 of 29	Within

All 13 systems the EPA tested in the Navajo Nation, 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 →