How many water violations are in Inyo County?

Inyo County has 1,965 total drinking water violations across 111 water systems, of which 791 are health-based violations. 91.9% of systems have at least one violation.

How many people get water from Inyo County systems?

Water systems in Inyo County serve approximately 49,669 people through 111 public water systems.

Has PFAS been detected in Inyo County water?

Under EPA UCMR5, 0 of 1 tested systems in Inyo County had at least one PFAS detection (0.0% of the UCMR5-tested subset - not of all 111 SDWIS systems).

What types of water sources supply Inyo County?

Water systems in Inyo County use GW (107 systems), SW (4 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. 40.3% of Inyo County's violations are health-based. Among counties with any SDWIS violations, this extract puts Inyo County in the higher health-based share band. Not all violations indicate immediate health risk, but they require corrective action.

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

According to EPA SDWIS county population served used on /counties, Inyo County ranks #961 of 3,254 counties by people served, and #46 of 58 counties in California. Ordinals use the same total_population DESC sort as the counties directory. See /methodology#corpus-placement.

Counties → California

Inyo County, California

Compiled by PlainWater · May 15, 2026

SDWIS compliance plate

Sheet CA027 · Inyo County 111 sys · 1,965 viol · #961/3254

VIOL-SEVERE · HEALTH-MID · RANK-UPPER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-MID · BOOK-FULL

VIOL-SEVERE 91.9% flagged
HEALTH-MID 40.3% health
RANK-UPPER #961/3254
PHOTO-FINISH ±0.2 pp
PFAS-CLEAN 0.0% detect
SRC-GW GW lead 96%
SYS-MID 111 systems
BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Madera County ( -0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Inyo County ranks #961 of 3,254 counties by people served, and #46 of 58 counties in California. See methodology · corpus placement.

Inyo County standing, lower-flagged corpus third

Flagged-system rate 91.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 40.3% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #961 of 3,254 · #46 of 58 in California.

Water Systems

System Name	Population	Violations	PFAS
Bishop Creek Chevron	16,793	0	-
Bishop, City Of	3,819	13	Clean
Petite Pantry	3,012	35	-
Lee's Frontier	2,000	0	-
Inyo County Pwd - Lone Pine	1,835	23	-
Pearsonville Water System	1,515	13	-
Highland Mobile Home Park	1,400	5	-
Rolling Green Utilities, Inc.	1,225	25	-
Inyo County Pwd - Independence	1,108	21	-
Indian Creek Csd	1,030	1	-
Cal Trans - Coso Junction	1,000	0	-
Big Pine Csd	792	9	-
Meadowcreek Mutual Water Company	764	15	-
Coso Junction Ranch Store	715	16	-
Sierra Highland Csd	600	10	-
Millpond Recreation Area	500	32	-
Diaz Lake Campground	500	23	-
Whitney Portal	500	12	-
Glenwood Mobile Estates	468	4	-
Mountain View Trailer Court	320	7	-
Four Jeffrey Campground	318	1	-
Owens Valley Water Resources, Inc.	311	13	-
Bishop Creek Lodge	305	29	-
Bishop Creek System	300	4	-
Cal Trans - Division Creek	300	3	-
Horseshoe Meadow Campground	300	6	-
Nps - Manzanar	298	2	-
Eastern Sierra College Center - Bishop	290	129	-
Astorgas Water System	250	29	-
Charles Brown Water Company	242	79	-
Starlite Community Service District	241	15	-
Tecopa Water Vending Machine	241	3	-
Pine Creek Village	240	89	-
Panamint Springs Resort	218	8	-
Death Valley Junction	201	33	-
High Sierra Water Company	200	4	-
Park West Mutual Water Company	188	2	-
Bernasconi Education Center	178	5	-
Keough's Hot Springs	175	33	-
Nps - Death Valley, Stovepipe Wells	175	7	-
Bishop Country Club	167	18	-
Wilson Circle Mutual Water Company	158	6	-
Schober Lane Campground	150	6	-
Quality Inn System	150	12	-
Nps - Death Valley, Furnace Creek	150	5	-
Nps - Death Valley, Emigrant Ra/Cg	150	2	-
Sierra Grande Estates Mutual Water Co.	138	8	-
Cartago Mutual Water Company	132	13	-
Brookside Mobile Home Park	126	4	-
Upper Sage Flat Campground	126	4	-

Compare beyond California

Lower-flagged peers for Inyo County

Cross-state counties nearest Inyo County on flagged-system share (91.9%) and cumulative violation count (1,965). 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.