PFAS in Navajo Nation drinking water
EPA's final UCMR 5 data covers 13 public water systems in Navajo Nation, serving about 71,627 people. PFAS turned up in 2 of them (15%). 0 averaged above at least one EPA limit at a sampling point.
Every tested system in Navajo Nation
Largest first. PFOA and PFOS columns show the average at each system's worst sampling point; EPA's limit for each is 4 ppt. Filter by name:
| Water system | People | PFOA | PFOS | PFAS found | Result |
|---|---|---|---|---|---|
| Farmington Rural-Shiprock-Beclabito NTUA · Ft Defiance | 15,233 | - | - | 0 | None found |
| Fort Defiance-Window Rock-St Michaels NTUA · Ft Defiance | 12,869 | - | - | 0 | None found |
| Chinle-Many Farms-Del Muerto NTUA · Ft Defiance | 8,458 | - | - | 0 | None found |
| Tuba City NTUA · Fort Defiance | 6,276 | - | - | 0 | None found |
| Pinon-District 4 NTUA · Ft Defiance | 5,195 | - | - | 0 | None found |
| Dilkon-Indian Wells-Greasewood-White Cone NTUA · Fort Defiance | 4,986 | - | - | 0 | None found |
| Mariano Lake-Pinedale-Church Rock NTUA · Ft Defiance | 4,562 | - | - | 0 | None found |
| Crownpoint-Littlewater-Three Mile Point NTUA · Ft Defiance | 3,950 | - | - | 0 | None found |
| Ganado-Burnside-Cornfield-Steamboat NTUA · Ft Defiance | 3,947 | - | - | 3 | Below limits |
| Kayenta NTUA · Ft Defiance | 3,844 | - | - | 1 | Below limits |
| Toadlena NTUA · Ft Defiance | 903 | - | - | 0 | None found |
| Greasewood Springs Community Boarding School BIA · Ganado | 720 | - | - | 0 | None found |
| Ganado Public Schools · Ganado | 684 | - | - | 0 | None found |
Cite this page
Well & Tap. "PFAS in Navajo Nation drinking water: results for 13 systems." Data: U.S. EPA UCMR 5, final release August 2026. https://wellandtap.com/pfas/navajo-nation/
Source: EPA UCMR 5 final occurrence data (August 2026); population from EPA SDWIS. Method.