Public water system · CA1400135
ActiveWilson Circle Mutual Water Company
At a glance
Wilson Circle Mutual Water Company (PWSID CA1400135) is an active community water system in Inyo County, California. It reports serving 158 people through 48 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
158
Service connections
48
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Wilson Circle Mutual Water Company compare with other water systems in Inyo County?
By EPA's size categories, Wilson Circle Mutual Water Company is a very small system (500 people or fewer). Inyo County has 112 active public water systems. Its population served is about 64% below the county average of 442 people per system, and accounts for 0.3% of the 49,451 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active community water system reports serving 6,703 people, so Wilson Circle Mutual Water Company is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active community water systems, 40% of the state's 7,479 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 6,179 California systems (83%) list groundwater as their primary source.
Who owns and regulates Wilson Circle Mutual Water Company?
EPA lists Wilson Circle Mutual Water Company as privately owned. The CA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 61 of the 112 active systems in Inyo County (54%) are also privately owned.
Does Wilson Circle Mutual Water Company have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025. The violations listed here began between July 1993 and January 2025. By type: 2 monitoring and 2 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 3 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2024-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 4 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Wilson Circle Mutual Water Company: frequently asked questions
Who runs Wilson Circle Mutual Water Company?
Wilson Circle Mutual Water Company (PWSID CA1400135) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Wilson Circle Mutual Water Company serve?
Wilson Circle Mutual Water Company reports serving 158 people through 48 service connections in Inyo County, California.
Where does Wilson Circle Mutual Water Company get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Wilson Circle Mutual Water Company have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Wilson Circle Mutual Water Company's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 4 violations for this system; none is health-based, and the most recent began in January 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Wilson Circle Mutual Water Company's water quality report?
As a community water system, Wilson Circle Mutual Water Company must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Inyo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bishop Creek Chevron | Inyo | 16,793 | Transient non-community | Groundwater |
| Bishop, City of | Inyo | 3,819 | Community | Groundwater |
| Petite Pantry | Inyo | 3,012 | Transient non-community | Groundwater |
| Lee'S Frontier | Inyo | 2,000 | Transient non-community | Groundwater |
| Inyo County PWD - Lone Pine | Inyo | 1,835 | Community | Purchased groundwater |
| Pearsonville Water System | Inyo | 1,515 | Transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Wilson Circle Mutual Water Company, PWSID CA1400135, California”, https://aquacensus.com/water-systems/california/wilson-circle-mutual-water-company-ca1400135 (data as of October 1, 2026).