County NN031 County, Navajo Nation

Water Systems

Population Served

27,501

Total Violations

3,615

PFAS Detected

of 2 tested

Water Systems

System Name	Population	Violations	PFAS
Mariano Lake-Pinedale-Church Rock NTUA	4,562	108	Detected
Crownpoint-Littlewater-Three Mile Point NTUA	3,950	84	Detected
Bread Springs-Chichiltah NTUA	2,066	324	—
Twin Lakes NTUA	1,833	93	—
Tohatchi-Mexican Springs-Twin Lakes NTUA	1,669	76	—
Defiance NTUA	1,659	158	—
Red Rock NTUA	1,652	57	—
Thoreau West-John Willie Camp-Baca NTUA	1,611	58	—
Crownpoint Boarding School BIA	1,024	110	—
Casamero Lake-Smith Lake NTUA	906	202	—
Tsa Yah Toh NTUA	865	77	—
Iyanbito NTUA	797	146	—
Thoreau High School	746	61	—
Standing Rock NTUA	739	95	—
Coyote Canyon-Bass Lake NTUA	622	73	—
Buffalo Springs NTUA	397	71	—
Baca-Haystack NTUA	376	145	—
Chuska Community Boarding School BIA	348	234	—
Fire Rock Navajo Casino	300	76	—
Whitehorse Lake NTUA	277	60	—
Mexican Springs West Rural NTUA	257	56	—
Tohatchi Public School	240	663	—
Mariano Lake Community School BIA	160	31	—
Tseiiahi (Standing Rock) Community School BIA	143	28	—
Former Pueblo Pintado Boarding School BIA	103	55	—
Ramona Smith Water Users Group Inc	77	199	—
Casamero Cup NTUA	48	124	—
Boardman Loop NTUA	48	10	—
Chevron Coal Company - North Mine	26	141	—