Public water system · CA0800532
ActiveBig Rock C.S.D.
At a glance
Big Rock C.S.D. (PWSID CA0800532) is an active community water system in Del Norte County, California. It reports serving 513 people through 117 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
513
Service connections
117
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Big Rock C.S.D. compare with other water systems in Del Norte County?
By EPA's size categories, Big Rock C.S.D. is a small system (501 to 3,300 people). Del Norte County has 31 active public water systems. Its population served is about half of the county average of 977 people per system, and accounts for 1.7% of the 30,300 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 Big Rock C.S.D. 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 Big Rock C.S.D.?
EPA lists Big Rock 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. 11 of the 31 active systems in Del Norte County (35%) are also owned by a local government.
Does Big Rock C.S.D. have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 2019. The violations listed here began between May 1984 and October 2019. By type: 6 monitoring and reporting, 5 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 7 as resolved and 5 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 |
|---|---|---|---|---|
| 2019-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-06-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | 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 |
| 1984-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-07-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-06-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1984-05-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
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.
Big Rock C.S.D.: frequently asked questions
Who runs Big Rock C.S.D.?
Big Rock C.S.D. (PWSID CA0800532) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Big Rock C.S.D. serve?
Big Rock C.S.D. reports serving 513 people through 117 service connections in Del Norte County, California.
Where does Big Rock C.S.D. 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 Big Rock C.S.D. have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 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 Big Rock 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. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in October 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 Big Rock C.S.D.'s water quality report?
As a community water system, Big Rock 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 Del Norte County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Crescent City | Del Norte | 17,262 | Community | Groundwater |
| Bertsch Ocean View Csd | Del Norte | 2,605 | Community | Purchased groundwater |
| Smith River C.S.D. | Del Norte | 2,568 | Community | Groundwater |
| Jedediah Smith State Park | Del Norte | 2,208 | Transient non-community | Groundwater |
| Del Norte Coast State Park - Mill Creek | Del Norte | 1,051 | Transient non-community | Groundwater under influence of surface water |
| Gasquet C.S.D. | Del Norte | 657 | 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, “Big Rock C.S.D., PWSID CA0800532, California”, https://aquacensus.com/water-systems/california/big-rock-c-s-d-ca0800532 (data as of October 1, 2026).