Public water system · CA4910028
ActiveSweetwater Springs Cwd - Monte Rio
At a glance
Sweetwater Springs Cwd - Monte Rio (PWSID CA4910028) is an active community water system in Sonoma County, California. It reports serving 3,000 people through 1,065 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,000
Service connections
1,065
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sweetwater Springs Cwd - Monte Rio compare with other water systems in Sonoma County?
By EPA's size categories, Sweetwater Springs Cwd - Monte Rio is a small system (501 to 3,300 people). Sonoma County has 441 active public water systems. Its population served is about 175% above the county average of 1,092 people per system, and accounts for 0.6% 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 - Monte Rio is about 55% 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 - Monte Rio?
EPA lists Sweetwater Springs Cwd - Monte Rio 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 - Monte Rio 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 Sweetwater Springs Cwd - Monte Rio. For the latest compliance status, check EPA ECHO for current compliance history.
Sweetwater Springs Cwd - Monte Rio: frequently asked questions
Who runs Sweetwater Springs Cwd - Monte Rio?
Sweetwater Springs Cwd - Monte Rio (PWSID CA4910028) 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 - Monte Rio serve?
Sweetwater Springs Cwd - Monte Rio reports serving 3,000 people through 1,065 service connections in Sonoma County, California.
Where does Sweetwater Springs Cwd - Monte Rio 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 - Monte Rio have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Sweetwater Springs Cwd - Monte Rio'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 Sweetwater Springs Cwd - Monte Rio's water quality report?
As a community water system, Sweetwater Springs Cwd - Monte Rio 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 - Monte Rio, PWSID CA4910028, California”, https://aquacensus.com/water-systems/california/sweetwater-springs-cwd-monte-rio-ca4910028 (data as of October 1, 2026).