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Counties → Navajo Nation

County profile · EPA SDWIS + UCMR5

County NN017 County, Navajo Nation

27 SDWIS-listed public water systems serve 26,234 people in County NN017 County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

27
SDWIS water systems Middle third of counties
4,391
Total violations Upper third of counties
100.0%
SDWIS systems w/ a violation Middle third of counties
25.0%
UCMR5 PFAS rate (4 tested) Middle third of counties with tests

SDWIS compliance plate

Sheet NN017 · County NN017 County 27 sys · 4,391 viol · #1503/3254

VIOL-SEVERE · HEALTH-LOW · RANK-MID · GAP-SOLO · PFAS-MID · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-LOW 6.7% health
  • RANK-MID #1503/3254
  • GAP-SOLO No peers
  • PFAS-MID 25.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 27 systems
  • BOOK-FULL 7/7 fields

According to EPA SDWIS county population served used on /counties, County NN017 County ranks #1,503 of 3,254 counties by people served, and #3 of 9 counties in Navajo Nation. See methodology · corpus placement.

County NN017 County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 6.7% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #1,503 of 3,254 · #3 of 9 in Navajo Nation.

Water Systems

System Name Population Violations PFAS
Pinon-District 4 NTUA 5,195 59 Clean
Dilkon-Indian Wells-Greasewood-White Cone NTUA 4,986 223 Clean
Kayenta NTUA 3,844 258 Detected
Kayenta Sandstone Housing 1,375 304 -
Chilchinbeto NTUA 1,276 50 -
Shonto Junction NTUA 1,146 57 -
Jeddito NTUA 1,105 121 -
Hard Rock NTUA 982 74 -
Greasewood Springs Community Boarding School BIA 720 216 Clean
Shonto Preparatory Boarding School BIA 664 106 -
Kayenta Community Boarding School BIA 500 124 -
Pinon Community Dormitory School BIA 500 37 -
Dilcon Community Boarding School BIA 473 114 -
Peabody Western Coal Company - Black Mesa Mines 420 106 -
Kitsillie-Black Mesa NTUA 414 35 -
Shonto NTUA 397 35 -
Low Mountain Boarding School BIA 339 163 -
Long House Valley NTUA 277 33 -
Monument Valley Navajo Tribal Park 275 117 -
Rocky Ridge Boarding School BIA 250 163 -
Seba Dalkai Boarding School BIA 250 191 -
Forest Lake NTUA 233 45 -
White Post Mission NTUA 185 1,145 -
Cottonwood Day School BIA 185 113 -
Chilchinbeto Community Day School BIA 138 143 -
Sanostee (New) Day School BIA 80 11 -
Navajo National Monument 25 348 -

Compare beyond Navajo Nation

Mid-flagged peers for County NN017 County

Cross-state counties nearest County NN017 County on flagged-system share (100.0%) and cumulative violation count (4,391). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.