Public Water Systems
170 active water systems in NN.
| System Name | Location | Population | Violations | PFAS |
|---|---|---|---|---|
| Toadlena NTUA | Ft Defiance, NN | 903 | 197 | Detected |
| Red Mesa Public Schools | Teec Nos Pos, NN | 900 | 857 | — |
| Round Rock NTUA | Ft Defiance, NN | 876 | 61 | — |
| Tsehootsooi Middle School | Fort Defiance, NN | 875 | 309 | — |
| Tsa Yah Toh NTUA | Ft Defiance, NN | 865 | 77 | — |
| Nazlini NTUA | Ft Defiance, NN | 862 | 179 | — |
| Narbona Pass NTUA | Ft Defiance, NN | 862 | 60 | — |
| Sawmill NTUA | Ft Defiance, NN | 838 | 64 | — |
| Iyanbito NTUA | Ft Defiance, NN | 797 | 146 | — |
| Kinlichee NTUA | Ft Defiance, NN | 787 | 56 | — |
| Alamo-Alamo Community | Alamo, NN | 785 | 899 | — |
| Nageezi NTUA | Ft Defiance, NN | 763 | 217 | — |
| Rock Point Community School BIA | Rock Point, NN | 758 | 116 | — |
| Red Valley North NTUA | Ft Defiance, NN | 756 | 44 | — |
| Teec Nos Pos NTUA | Ft Defiance, NN | 752 | 64 | — |
| Thoreau High School | Thoreau, NN | 746 | 61 | — |
| Cameron NTUA | Fort Defiance, NN | 742 | 137 | — |
| Standing Rock NTUA | Ft Defiance, NN | 739 | 95 | — |
| Cove NTUA | Ft Defiance, NN | 728 | 120 | — |
| Greasewood Springs Community Boarding School BIA | Ganado, NN | 720 | 216 | Detected |
| Crystal NTUA | Ft Defiance, NN | 715 | 61 | — |
| Monument Valley Utah Schools | Blanding, NN | 700 | 303 | — |
| Ganado Public Schools | Ganado, NN | 684 | 395 | Detected |
| Shonto Preparatory Boarding School BIA | Shonto, NN | 664 | 106 | — |
| Coyote Canyon-Bass Lake NTUA | Ft Defiance, NN | 622 | 73 | — |
| Newcomb NTUA | Ft Defiance, NN | 602 | 57 | — |
| Alamo Navajo Community School BIA | Magdalena, NN | 600 | 110 | — |
| St Michael Indian School | St Michaels, NN | 585 | 1,202 | — |
| Kayenta Community Boarding School BIA | Kayenta, NN | 500 | 124 | — |
| Pinon Community Dormitory School BIA | Pinon, NN | 500 | 37 | — |
| Lukachukai Community School new | Lukachukai, NN | 500 | 13 | — |
| Burnham Junction Mustang | Dallas, NN | 500 | 114 | — |
| White Mesa NTUA | Fort Defiance, NN | 496 | 96 | — |
| White Rock-Lake Valley NTUA | Ft Defiance, NN | 492 | 220 | — |
| Dilcon Community Boarding School BIA | Winslow, NN | 473 | 114 | — |
| Dzilth-Na-O-Dith-Hle NTUA | Ft Defiance, NN | 462 | 200 | — |
| Rough Rock NTUA | Ft Defiance, NN | 455 | 44 | — |
| Canoncito Community Day School BIA | Tohajiilee, NN | 437 | 141 | — |
| Montezuma Creek NTUA | Ft Defiance, NN | 424 | 130 | — |
| Peabody Western Coal Company - Black Mesa Mines | Kayenta, NN | 420 | 106 | — |
| Kitsillie-Black Mesa NTUA | Ft Defiance, NN | 414 | 35 | — |
| Kaibeto (Upper) Boarding School BIA | Kaibeto, NN | 400 | 250 | — |
| Shonto NTUA | Ft Defiance, NN | 397 | 35 | — |
| Buffalo Springs NTUA | Ft Defiance, NN | 397 | 71 | — |
| Round Rock Elementary School | Teec Nos Pos, NN | 396 | 801 | — |
| Coal Mine Mesa NTUA | Fort Defiance, NN | 393 | 124 | — |
| Oak Springs NTUA (south of Hunters Point) | Ft Defiance, NN | 390 | 44 | — |
| Baca-Haystack NTUA | Ft Defiance, NN | 376 | 145 | — |
| Mittenrock NTUA | Ft Defiance, NN | 352 | 95 | — |
| Rough Rock Community High School BIA | Chinle, NN | 350 | 134 | — |