Public water system · CA5510851
ActiveCdcr - Sierra Conservation Center
At a glance
Cdcr - Sierra Conservation Center (PWSID CA5510851) is an active community water system in Tuolumne County, California. It reports serving 3,571 people through 578 service connections. Its primary water source is surface water, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in January 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,571
Service connections
578
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Cdcr - Sierra Conservation Center compare with other water systems in Tuolumne County?
By EPA's size categories, Cdcr - Sierra Conservation Center is a medium system (3,301 to 10,000 people). Tuolumne County has 117 active public water systems, and Cdcr - Sierra Conservation Center is the 5th-largest of them by population served. Its population served is about 5.1 times the county average of 706 people per system, and accounts for 4.3% of the 82,611 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 Cdcr - Sierra Conservation Center is about half of 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates Cdcr - Sierra Conservation Center?
EPA lists Cdcr - Sierra Conservation Center 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. 3 of the 117 active systems in Tuolumne County (2.6%) are also owned by a state government.
Does Cdcr - Sierra Conservation Center have drinking water violations?
Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in January 2019. The violations listed here began between January 2004 and January 2019. By type: 7 required treatment not met, 4 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Carbon, total (7 of them). EPA lists 12 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2019-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2018-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2018-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2013-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2009-04-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2009-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2008-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2008-07-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2008-04-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2008-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
| 2004-01-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | Yes | Resolved |
The 12 most recent 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.
Cdcr - Sierra Conservation Center: frequently asked questions
Who runs Cdcr - Sierra Conservation Center?
Cdcr - Sierra Conservation Center (PWSID CA5510851) is a community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Cdcr - Sierra Conservation Center serve?
Cdcr - Sierra Conservation Center reports serving 3,571 people through 578 service connections in Tuolumne County, California.
Where does Cdcr - Sierra Conservation Center get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Cdcr - Sierra Conservation Center have any drinking water violations?
Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in January 2019. 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 Cdcr - Sierra Conservation Center'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. Of the 12 most recent violations in EPA's records, 11 are health-based, and the most recent began in January 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Cdcr - Sierra Conservation Center's water quality report?
As a community water system, Cdcr - Sierra Conservation Center 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 Tuolumne County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Tud - Upper Basin Water System | Tuolumne | 13,280 | Community | Surface water |
| Tud - Sonora/Jamestown Water System | Tuolumne | 11,054 | Community | Surface water |
| Tud - Columbia Water System | Tuolumne | 5,463 | Community | Surface water |
| Peppery Bar and Grill, the | Tuolumne | 4,500 | Transient non-community | Groundwater |
| Groveland Community Serv Dist | Tuolumne | 3,400 | Community | Surface water |
| Lake Don Pedro Csd | Tuolumne | 3,240 | Community | 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, “Cdcr - Sierra Conservation Center, PWSID CA5510851, California”, https://aquacensus.com/water-systems/california/cdcr-sierra-conservation-center-ca5510851 (data as of October 1, 2026).