Public water system · CA4010018
ActiveGolden State Water Company - Nipomo
At a glance
Golden State Water Company - Nipomo (PWSID CA4010018) is an active community water system in San Luis Obispo County, California. It reports serving 4,506 people through 1,492 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,506
Service connections
1,492
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Golden State Water Company - Nipomo compare with other water systems in San Luis Obispo County?
By EPA's size categories, Golden State Water Company - Nipomo is a medium system (3,301 to 10,000 people). San Luis Obispo County has 171 active public water systems. Its population served is about 121% above the county average of 2,038 people per system, and accounts for 1.3% 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 - Nipomo is about 33% 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Golden State Water Company - Nipomo?
EPA lists Golden State Water Company - Nipomo 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 - Nipomo have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Golden State Water Company - Nipomo. For the latest compliance status, check EPA ECHO for current compliance history.
Golden State Water Company - Nipomo: frequently asked questions
Who runs Golden State Water Company - Nipomo?
Golden State Water Company - Nipomo (PWSID CA4010018) 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 - Nipomo serve?
Golden State Water Company - Nipomo reports serving 4,506 people through 1,492 service connections in San Luis Obispo County, California.
Where does Golden State Water Company - Nipomo get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Golden State Water Company - Nipomo have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Golden State Water Company - Nipomo'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 Safe Drinking Water Act records list no violations for this system. 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 - Nipomo's water quality report?
As a community water system, Golden State Water Company - Nipomo 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 - Nipomo, PWSID CA4010018, California”, https://aquacensus.com/water-systems/california/golden-state-water-company-nipomo-ca4010018 (data as of October 1, 2026).