Public water system · CA1310800
ActiveCalipatria State Prison
At a glance
Calipatria State Prison (PWSID CA1310800) is an active community water system in Imperial County, California. It reports serving 4,800 people through 1,979 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's records list 5 violations for this system; 4 are health-based, and the most recent began in February 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,800
Service connections
1,979
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Calipatria State Prison compare with other water systems in Imperial County?
By EPA's size categories, Calipatria State Prison is a medium system (3,301 to 10,000 people). Imperial County has 76 active public water systems. Its population served is about twice the county average of 2,444 people per system, and accounts for 2.6% of the 185,748 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 Calipatria State Prison is about 28% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Calipatria State Prison?
EPA lists Calipatria State Prison as owned by a state government. 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. 7 of the 76 active systems in Imperial County (9.2%) are also owned by a state government.
Does Calipatria State Prison have drinking water violations?
EPA's records list 5 violations for this system; 4 are health-based, and the most recent began in February 2012. The violations listed here began between February 1998 and February 2012. By type: 3 contaminant level above the legal limit, 1 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2012-02-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1998-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 5 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.
Calipatria State Prison: frequently asked questions
Who runs Calipatria State Prison?
Calipatria State Prison (PWSID CA1310800) is a community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Calipatria State Prison serve?
Calipatria State Prison reports serving 4,800 people through 1,979 service connections in Imperial County, California.
Where does Calipatria State Prison get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Calipatria State Prison have any drinking water violations?
EPA's records list 5 violations for this system; 4 are health-based, and the most recent began in February 2012. 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 Calipatria State Prison'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 5 violations for this system; 4 are health-based, and the most recent began in February 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Calipatria State Prison's water quality report?
As a community water system, Calipatria State Prison 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 Imperial County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| El Centro, City of | Imperial | 43,772 | Community | Purchased surface water |
| Calexico, City of | Imperial | 40,357 | Community | Purchased surface water |
| Brawley, City of | Imperial | 26,862 | Community | Purchased surface water |
| Imperial, City of | Imperial | 21,591 | Community | Purchased surface water |
| Imperial Valley College | Imperial | 8,150 | Non-transient non-community | Surface water |
| Gswc - Calipatria | Imperial | 7,363 | Community | Purchased surface water |
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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, “Calipatria State Prison, PWSID CA1310800, California”, https://aquacensus.com/water-systems/california/calipatria-state-prison-ca1310800 (data as of October 1, 2026).