Public water system · CA4300992
ActiveGolden Heights Mutual Water Company
At a glance
Golden Heights Mutual Water Company (PWSID CA4300992) is an active community water system in Santa Clara County, California. It reports serving 66 people through 21 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
66
Service connections
21
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Golden Heights Mutual Water Company compare with other water systems in Santa Clara County?
By EPA's size categories, Golden Heights Mutual Water Company is a very small system (500 people or fewer). Santa Clara County has 121 active public water systems. Its population served is well below the county average of 17,334 people per system, and accounts for less than 0.1% of the 2,097,447 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 Heights Mutual Water Company 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 Heights Mutual Water Company?
EPA lists Golden Heights Mutual Water Company 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. 82 of the 121 active systems in Santa Clara County (68%) are also privately owned.
Does Golden Heights Mutual Water Company have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2011. The violations listed here began between July 2009 and April 2011. By type: 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2011-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 2 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 Heights Mutual Water Company: frequently asked questions
Who runs Golden Heights Mutual Water Company?
Golden Heights Mutual Water Company (PWSID CA4300992) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Golden Heights Mutual Water Company serve?
Golden Heights Mutual Water Company reports serving 66 people through 21 service connections in Santa Clara County, California.
Where does Golden Heights Mutual Water Company 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 Heights Mutual Water Company have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2011. 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 Heights Mutual Water Company'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 2 violations for this system; all are health-based, and the most recent began in April 2011. 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 Heights Mutual Water Company's water quality report?
As a community water system, Golden Heights Mutual Water Company 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 Santa Clara County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Jose Water | Santa Clara | 1,039,920 | Community | Surface water |
| City of Sunnyvale | Santa Clara | 157,566 | Community | Purchased surface water |
| City of Santa Clara | Santa Clara | 130,746 | Community | Purchased surface water |
| Great Oaks Wc Inc. | Santa Clara | 110,088 | Community | Groundwater |
| City of San Jose - Evg/Edv/Coy | Santa Clara | 101,265 | Community | Purchased surface water |
| City of Milpitas | Santa Clara | 81,773 | Community | Purchased 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 Heights Mutual Water Company, PWSID CA4300992, California”, https://aquacensus.com/water-systems/california/golden-heights-mutual-water-company-ca4300992 (data as of October 1, 2026).