Public water system · CA5310001
ActiveWeaverville C.S.D.
At a glance
Weaverville C.S.D. (PWSID CA5310001) is an active community water system in Trinity County, California. It reports serving 3,975 people through 1,536 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,975
Service connections
1,536
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Weaverville C.S.D. compare with other water systems in Trinity County?
By EPA's size categories, Weaverville C.S.D. is a medium system (3,301 to 10,000 people). Trinity County has 42 active public water systems, and Weaverville C.S.D. is the largest of them by population served. Its population served is about 11 times the county average of 347 people per system, and accounts for 27% of the 14,561 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 Weaverville C.S.D. is about 41% 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. 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 Weaverville C.S.D.?
EPA lists Weaverville C.S.D. as owned by a local 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. 5 of the 42 active systems in Trinity County (12%) are also owned by a local government.
Does Weaverville C.S.D. have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in December 2025. The violations listed here began between June 1993 and December 2025. By type: 2 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Surface Water Treatment Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2025-12-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Archived |
| 2019-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 3 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.
Weaverville C.S.D.: frequently asked questions
Who runs Weaverville C.S.D.?
Weaverville C.S.D. (PWSID CA5310001) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Weaverville C.S.D. serve?
Weaverville C.S.D. reports serving 3,975 people through 1,536 service connections in Trinity County, California.
Where does Weaverville C.S.D. 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 Weaverville C.S.D. have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in December 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 Weaverville C.S.D.'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 3 violations for this system; 2 are health-based, and the most recent began in December 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 Weaverville C.S.D.'s water quality report?
As a community water system, Weaverville C.S.D. 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 Trinity County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Trinity Co. W.W. Dist #1 | Trinity | 2,324 | Community | Surface water |
| Trinity Center M.W.C. | Trinity | 729 | Community | Surface water |
| Lewiston Community Services District | Trinity | 677 | Community | Surface water |
| Clark System | Trinity | 450 | Transient non-community | Groundwater |
| Hayward Flat Campground | Trinity | 440 | Transient non-community | Groundwater |
| Tannery Gulch Campground | Trinity | 410 | 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, “Weaverville C.S.D., PWSID CA5310001, California”, https://aquacensus.com/water-systems/california/weaverville-c-s-d-ca5310001 (data as of October 1, 2026).