Public water system · CA5400744
ActiveEast Three Rivers Mutual Water Corp
At a glance
East Three Rivers Mutual Water Corp (PWSID CA5400744) is an active community water system in Tulare County, California. It reports serving 40 people through 15 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
15
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does East Three Rivers Mutual Water Corp compare with other water systems in Tulare County?
By EPA's size categories, East Three Rivers Mutual Water Corp is a very small system (500 people or fewer). Tulare County has 274 active public water systems. Its population served is well below the county average of 1,700 people per system, and accounts for less than 0.1% of the 465,710 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 East Three Rivers Mutual Water Corp 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 East Three Rivers Mutual Water Corp?
EPA lists East Three Rivers Mutual Water Corp 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. 184 of the 274 active systems in Tulare County (67%) are also privately owned.
Does East Three Rivers Mutual Water Corp have drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in July 2025. The violations listed here began between November 2015 and July 2025. By type: 3 monitoring, 2 public notice, recordkeeping or other, 1 reporting, 1 required treatment not met, 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 6 as resolved and 3 as addressed. 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. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Addressed |
| 2024-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-10-17 | ReportingLSL Reporting · code 4G | Lead and Copper Rule Revisionscode 5200 | No | Addressed |
| 2024-10-17 | Required treatment not metLSL Inventory · code 2E | Lead and Copper Rule Revisionscode 5200 | Yes | Addressed |
| 2024-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2016-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2015-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
East Three Rivers Mutual Water Corp: frequently asked questions
Who runs East Three Rivers Mutual Water Corp?
East Three Rivers Mutual Water Corp (PWSID CA5400744) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does East Three Rivers Mutual Water Corp serve?
East Three Rivers Mutual Water Corp reports serving 40 people through 15 service connections in Tulare County, California.
Where does East Three Rivers Mutual Water Corp 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 East Three Rivers Mutual Water Corp have any drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in July 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 East Three Rivers Mutual Water Corp'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 9 violations for this system; 2 are health-based, and the most recent began in July 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 East Three Rivers Mutual Water Corp's water quality report?
As a community water system, East Three Rivers Mutual Water Corp 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 Tulare County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cws - Visalia | Tulare | 148,496 | Community | Groundwater |
| Tulare, City of | Tulare | 72,241 | Community | Groundwater |
| Porterville, City of | Tulare | 63,487 | Community | Groundwater |
| Dinuba, City of | Tulare | 27,281 | Community | Groundwater |
| Lindsay, City of | Tulare | 12,659 | Community | Surface water |
| Exeter, City of | Tulare | 11,169 | 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, “East Three Rivers Mutual Water Corp, PWSID CA5400744, California”, https://aquacensus.com/water-systems/california/east-three-rivers-mutual-water-corp-ca5400744 (data as of October 1, 2026).