Navajo County Water Quality
Arizona
According to EPA SDWIS, Navajo County, Arizona hosts 45 community water systems covering about 73,968 people. The same extract lists 968 health-based violation records across 25 systems. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Navajo County, Arizona hosts 45 EPA-regulated community water systems delivering drinking water to approximately 73,968 people. Each system is catalogued in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which mandates monitoring for dozens of regulated contaminants, public notification when standards are exceeded, and the issuance of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 968 violation records across these active community systems, with 25 systems carrying at least one record. The extract excludes monitoring and reporting violations. The county contains 17 incorporated places where these systems deliver service.
A historical health-based registry row does not establish water delivered today or describe current compliance. For current conditions, request the utility's most recent Consumer Confidence Report or contact the Arizona drinking water program. Figures shown here reflect only the health-based subset fetched from federal EPA SDWIS.
What water systems serve Navajo County?
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| CITY OF SHOW LOW | 17,139 | 1 | Health |
| WINSLOW CITY OF | 9,789 | 0 | Clean |
| SNOWFLAKE TOWN OF | 5,590 | 0 | Clean |
| PONDEROSA DWID | 5,375 | 0 | Clean |
| HOLBROOK CITY OF | 4,833 | 1 | Health |
| TOWN OF TAYLOR | 4,190 | 0 | Clean |
| Polacca | 3,890 | 223 | Health |
| PINETOP WATER COMMUNITY FACILITIES DIST | 3,250 | 0 | Clean |
| VOYAGER AT WHITE MOUNTAIN LAKES WC | 1,997 | 3 | Health |
| JOSEPH CITY DWID | 1,811 | 0 | Clean |
| Shungopavi | 1,430 | 189 | Health |
| Kykotsmovi | 1,302 | 3 | Health |
| WHITE MOUNTAIN SUMMER HOMES DWID | 1,233 | 0 | Clean |
| Hopi High School - BIA | 1,005 | 35 | Health |
| BIA Keams Canyon | 925 | 5 | Health |
| TIMBERLAND ACRES DWID | 922 | 0 | Clean |
| Shonto Preparatory Boarding School BIA | 664 | 0 | Clean |
| Sipaulovi (Lower Sipaulovi/Lower Mishongnovi) | 609 | 126 | Health |
| Kayenta Community Boarding School BIA | 500 | 0 | Clean |
| Pinon Community Dormitory School BIA | 500 | 0 | Clean |
| Mishongnovi (Upper Sipaulovi/Upper Mishongnovi) | 490 | 124 | Health |
| WHITE MOUNTAIN WATER COMPANY | 475 | 2 | Health |
| Dilcon Community Boarding School BIA | 473 | 5 | Health |
| COUNTRY LANE TRAILER PARK | 450 | 13 | Health |
| CLAY SPRINGS DWID | 425 | 0 | Clean |
| SKY HI DWID | 390 | 4 | Health |
| Hopi Veterans Center | 388 | 1 | Health |
| WONDERLAND ACRES DWID | 380 | 3 | Health |
| PINEDALE DWID | 376 | 4 | Health |
| Low Mountain Boarding School BIA | 339 | 0 | Clean |
| PORTER MOUNTAIN DWID | 322 | 1 | Health |
| BUCKSKIN ARTISTS COMMUNITY | 320 | 4 | Health |
| SUN VALLEY UTILITIES | 287 | 5 | Health |
| Second Mesa Day School - BIA | 255 | 34 | Health |
| PORTER CREEK DWID | 250 | 2 | Health |
| Rocky Ridge Boarding School BIA | 250 | 0 | Clean |
| Seba Dalkai Boarding School BIA | 250 | 126 | Health |
| PINEDALE ESTATES DWID | 208 | 48 | Health |
| SWEETWATER RANCH - TOWN OF TAYLOR | 180 | 0 | Clean |
| WOODRUFF DOMESTIC WATER COMPANY INC | 140 | 6 | Health |
| Chilchinbeto Community Day School BIA | 138 | 0 | Clean |
| HOLBROOK SDA INDIAN SCHOOL | 100 | 0 | Clean |
| RETAW WATER COMPANY | 47 | 0 | Clean |
| MISTY MOUNTAIN DWID | 44 | 0 | Clean |
| AMERICAN INDIAN CHRISTIAN MISSION | 37 | 0 | Clean |
Cities in Navajo County
How does Navajo County compare in Arizona?
Of the 15 Arizona counties with at least one community water system on file, Navajo County ranks #8 by number of systems (45).
Either side of it: Gila County (47), Coconino County (45), Mohave County (39), Cochise County (32)
What are Navajo County's health-based records for?
Navajo County's health-based violation records carry 8 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results, and a historical record does not establish present water quality.
| Contaminant | Records | Systems |
|---|---|---|
| Arsenic | 719 | 8 |
| Tthm | 130 | 2 |
| Selenium | 48 | 1 |
| Groundwater Rule | 43 | 11 |
| Lead and Copper Rule Revisions | 11 | 10 |
| Antimony, Total | 4 | 1 |
| Fluoride | 3 | 1 |
| Coliform (TCR) | 3 | 1 |
About This Data
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
Figures here are the current EPA SDWIS extract joined to the 45 community water systems whose service area falls in Navajo County, ranked against the 15 Arizona counties with at least one system on file. Data current as of 2026-08-25. Editorial standards, methodology, report an error.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
Read our methodology - how this data is sourced, computed, and verified.