How many water violations are in Navajo County?

Navajo County has 9,952 total drinking water violations across 63 water systems, of which 379 are health-based violations. 100.0% of systems have at least one violation.

How many people get water from Navajo County systems?

Water systems in Navajo County serve approximately 99,221 people through 63 public water systems.

Has PFAS been detected in Navajo County water?

Under EPA UCMR5, 2 of 8 tested systems in Navajo County had at least one PFAS detection (25.0% of the UCMR5-tested subset - not of all 63 SDWIS systems).

What types of water sources supply Navajo County?

Water systems in Navajo County use GW (63 systems) as their primary water sources.

Are health-based violations serious?

Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 3.8% of Navajo County's violations are health-based. Among counties with any SDWIS violations, this extract puts Navajo County in the lower health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

Where does Navajo County sit among U.S. counties for water-system population?

According to EPA SDWIS county population served used on /counties, Navajo County ranks #582 of 3,254 counties by people served, and #9 of 15 counties in Arizona. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → Arizona

Navajo County, Arizona

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet AZ017 · Navajo County 63 sys · 9,952 viol · #582/3254

VIOL-SEVERE · HEALTH-LOW · RANK-TOP · PHOTO-FINISH · PFAS-MID · SRC-GW · SYS-MID · BOOK-FULL

VIOL-SEVERE 100.0% flagged
HEALTH-LOW 3.8% health
RANK-TOP #582/3254
PHOTO-FINISH ±0.0 pp
PFAS-MID 25.0% detect
SRC-GW GW lead 100%
SYS-MID 63 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Cochise County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Navajo County ranks #582 of 3,254 counties by people served, and #9 of 15 counties in Arizona. See methodology · corpus placement.

Navajo 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 3.8% 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 #582 of 3,254 · #9 of 15 in Arizona.

Water Systems

System Name	Population	Violations	PFAS
City of Show Low	17,139	825	Clean
Arizona Water Co - Overgaard	13,797	69	Clean
Arizona Water Co - Lakeside	12,191	89	Detected
Winslow City Of	9,789	256	Clean
Snowflake Town Of	5,590	144	Clean
Ponderosa Dwid	5,375	508	Detected
Holbrook City Of	5,318	207	Clean
Town of Taylor	4,190	309	-
Arizona Water Co - Pinetop Lakes	3,513	9	Clean
Pinetop Water Community Facilities Dist	3,250	430	-
Voyager at White Mountain Lakes WC	1,997	549	-
Joseph City Dwid	1,811	318	-
White Mountain Summer Homes Dwid	1,233	248	-
Watco Water	1,153	79	-
Mountain Glen Water Servic Linden Trails	975	128	-
Timberland Acres Dwid	922	207	-
Heber Dwid	839	225	-
Cs High Country Pines Water Company	668	93	-
Navajo Water - Summer Pines	580	88	-
Navajo County Government Complex	540	203	-
White Mountain Water Company	475	116	-
Holbrook Travel Center #246	450	89	-
Country Lane Trailer Park	450	250	-
Clay Springs Dwid	425	176	-
Pinedale Clay Spring Lds	400	33	-
Sky HI Dwid	390	162	-
Wonderland Acres Dwid	380	323	-
Pinedale Dwid	376	193	-
Timberline MHP	350	58	-
Porter Mountain Dwid	322	275	-
Buckskin Artists Community	320	85	-
Heber Lds Youth Camp	300	4	-
Sun Valley Utilities	287	273	-
Porter Creek Dwid	250	192	-
Pinedale Estates Dwid	208	271	-
Rocky Rim Resort Cabins	200	20	-
Concern Inc Camp Shadow	200	22	-
AZ Public Service Co Cholla Water	200	48	-
Navajo Water - Chaparral Pines	198	107	-
Sweetwater Ranch - Town of Taylor	180	145	-
A Petersen Water Company	160	120	-
Linden Lds Church	150	63	-
Lazy L Resort RV Park	150	85	-
Apache Acres MHP	150	366	-
Woodruff Domestic Water Company Inc	140	225	-
Yosemite Meats	130	38	-
Heber Dwid - Black Canyon Subdivision	103	45	-
Holbrook SDA Indian School	100	200	-
Ncpr Tall Timbers County	100	87	-
Navajo Water - Laguna Estates	89	59	-

Compare beyond Arizona

Mid-flagged peers for Navajo County

Cross-state counties nearest Navajo County on flagged-system share (100.0%) and cumulative violation count (9,952). 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

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

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