Public water system · CA4910004
ActiveSweetwater Springs Cwd - Guerneville
At a glance
Sweetwater Springs Cwd - Guerneville (PWSID CA4910004) is an active community water system in Sonoma County, California. It reports serving 6,000 people through 2,556 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in November 1995.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,000
Service connections
2,556
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sweetwater Springs Cwd - Guerneville compare with other water systems in Sonoma County?
By EPA's size categories, Sweetwater Springs Cwd - Guerneville is a medium system (3,301 to 10,000 people). Sonoma County has 441 active public water systems. Its population served is about 5.5 times the county average of 1,092 people per system, and accounts for 1.2% of the 481,435 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 Sweetwater Springs Cwd - Guerneville is about 10% 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 Sweetwater Springs Cwd - Guerneville?
EPA lists Sweetwater Springs Cwd - Guerneville 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. 58 of the 441 active systems in Sonoma County (13%) are also owned by a local government.
Does Sweetwater Springs Cwd - Guerneville have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in November 1995. The violations listed here began between December 1994 and November 1995. By type: 1 monitoring and reporting and 1 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 |
|---|---|---|---|---|
| 1995-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-12-01 | 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.
Sweetwater Springs Cwd - Guerneville: frequently asked questions
Who runs Sweetwater Springs Cwd - Guerneville?
Sweetwater Springs Cwd - Guerneville (PWSID CA4910004) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Sweetwater Springs Cwd - Guerneville serve?
Sweetwater Springs Cwd - Guerneville reports serving 6,000 people through 2,556 service connections in Sonoma County, California.
Where does Sweetwater Springs Cwd - Guerneville 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 Sweetwater Springs Cwd - Guerneville have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in November 1995. 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 Sweetwater Springs Cwd - Guerneville'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; 1 is health-based, and the most recent began in November 1995. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Sweetwater Springs Cwd - Guerneville's water quality report?
As a community water system, Sweetwater Springs Cwd - Guerneville 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 Sonoma County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Rosa, City of | Sonoma | 175,396 | Community | Groundwater |
| Petaluma, City of | Sonoma | 60,781 | Community | Groundwater |
| Rohnert Park, City of | Sonoma | 43,821 | Community | Groundwater |
| Windsor, Town of | Sonoma | 25,561 | Community | Groundwater |
| Valley of the Moon Water District | Sonoma | 23,107 | Community | Groundwater |
| Sonoma, City of | Sonoma | 11,725 | Community | Groundwater |
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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, “Sweetwater Springs Cwd - Guerneville, PWSID CA4910004, California”, https://aquacensus.com/water-systems/california/sweetwater-springs-cwd-guerneville-ca4910004 (data as of October 1, 2026).