Public water system · CA4010040
ActiveGolden State Water Company-Cypress Ridge
At a glance
Golden State Water Company-Cypress Ridge (PWSID CA4010040) is an active community water system in San Luis Obispo County, California. It reports serving 2,026 people through 966 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,026
Service connections
966
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Golden State Water Company-Cypress Ridge compare with other water systems in San Luis Obispo County?
By EPA's size categories, Golden State Water Company-Cypress Ridge is a small system (501 to 3,300 people). San Luis Obispo County has 171 active public water systems. Its population served is roughly in line with the county average of 2,038 people per system, and accounts for 0.6% 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 Golden State Water Company-Cypress Ridge 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 Golden State Water Company-Cypress Ridge?
EPA lists Golden State Water Company-Cypress Ridge as privately owned. 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. 130 of the 171 active systems in San Luis Obispo County (76%) are also privately owned.
Does Golden State Water Company-Cypress Ridge have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2013. The violations listed here began between April 2000 and January 2013. By type: 8 monitoring and reporting, 2 contaminant level above the legal limit and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (3 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 |
|---|---|---|---|---|
| 2013-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 2011-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-07-01 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Nitratecode 1040 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherNotification, State · code 05 | Nitratecode 1040 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2010-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitrate-Nitritecode 1038 | Yes | Resolved |
| 2008-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2002-05-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Check/Repeat/Confirmation · code 04 | Nitritecode 1041 | No | Resolved |
| 2000-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | 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.
Golden State Water Company-Cypress Ridge: frequently asked questions
Who runs Golden State Water Company-Cypress Ridge?
Golden State Water Company-Cypress Ridge (PWSID CA4010040) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Golden State Water Company-Cypress Ridge serve?
Golden State Water Company-Cypress Ridge reports serving 2,026 people through 966 service connections in San Luis Obispo County, California.
Where does Golden State Water Company-Cypress Ridge 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 Golden State Water Company-Cypress Ridge have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in January 2013. 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 Golden State Water Company-Cypress Ridge'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, 2 are health-based, and the most recent began in January 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Golden State Water Company-Cypress Ridge's water quality report?
As a community water system, Golden State Water Company-Cypress Ridge 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, “Golden State Water Company-Cypress Ridge, PWSID CA4010040, California”, https://aquacensus.com/water-systems/california/golden-state-water-company-cypress-ridge-ca4010040 (data as of October 1, 2026).