Public water system · CA4010004
ActiveCity of Grover Beach Public Works Dept
At a glance
City of Grover Beach Public Works Dept (PWSID CA4010004) is an active community water system in San Luis Obispo County, California. It reports serving 12,701 people through 5,005 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; all are health-based, and the most recent began in September 2008.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
12,701
Service connections
5,005
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Grover Beach Public Works Dept compare with other water systems in San Luis Obispo County?
By EPA's size categories, City of Grover Beach Public Works Dept is a large system (10,001 to 100,000 people). San Luis Obispo County has 171 active public water systems. Its population served is about 6.2 times the county average of 2,038 people per system, and accounts for 3.6% of the 348,510 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 City of Grover Beach Public Works Dept is about 89% above 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 City of Grover Beach Public Works Dept?
EPA lists City of Grover Beach Public Works Dept 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. 33 of the 171 active systems in San Luis Obispo County (19%) are also owned by a local government.
Does City of Grover Beach Public Works Dept have drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in September 2008. The violations listed here began between April 1993 and September 2008. By type: 3 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 3 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 |
|---|---|---|---|---|
| 2008-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1997-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 1993-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | 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.
City of Grover Beach Public Works Dept: frequently asked questions
Who runs City of Grover Beach Public Works Dept?
City of Grover Beach Public Works Dept (PWSID CA4010004) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does City of Grover Beach Public Works Dept serve?
City of Grover Beach Public Works Dept reports serving 12,701 people through 5,005 service connections in San Luis Obispo County, California.
Where does City of Grover Beach Public Works Dept 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 City of Grover Beach Public Works Dept have any drinking water violations?
EPA's records list 3 violations for this system; all are health-based, and the most recent began in September 2008. 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 City of Grover Beach Public Works Dept'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; all are health-based, and the most recent began in September 2008. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find City of Grover Beach Public Works Dept's water quality report?
As a community water system, City of Grover Beach Public Works Dept 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 San Luis Obispo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Margarita Recreation Area | San Luis Obispo | 50,001 | Transient non-community | Groundwater |
| San Luis Obispo Water Department | San Luis Obispo | 47,788 | Community | Surface water |
| City of Paso Robles Water Division | San Luis Obispo | 31,176 | Community | Surface water |
| Atascadero Mutual Water Co | San Luis Obispo | 30,618 | Community | Groundwater |
| City of Arroyo Grande Utilities Division | San Luis Obispo | 17,963 | Community | Purchased surface water |
| California Mens Colony | San Luis Obispo | 15,000 | 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, “City of Grover Beach Public Works Dept, PWSID CA4010004, California”, https://aquacensus.com/water-systems/california/city-of-grover-beach-public-works-dept-ca4010004 (data as of October 1, 2026).