Public water system · CA4901445
ActiveJames Court Water System
At a glance
James Court Water System (PWSID CA4901445) is an active community water system in Sonoma County, California. It reports serving 208 people through 40 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in April 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
208
Service connections
40
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does James Court Water System compare with other water systems in Sonoma County?
By EPA's size categories, James Court Water System is a very small system (500 people or fewer). Sonoma County has 441 active public water systems. Its population served is well below the county average of 1,092 people per system, and accounts for less than 0.1% 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 James Court Water System 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 James Court Water System?
EPA lists James Court Water System 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. 371 of the 441 active systems in Sonoma County (84%) are also privately owned.
Does James Court Water System have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in April 2019. By type: 1 required treatment not met. The contaminant or rule involved is Groundwater Rule. EPA lists 1 as addressed. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2019-04-01 | Required treatment not metFailure to Filter (SWTR) · code 42 | Groundwater Rulecode 0700 | Yes | Addressed |
The one violation in EPA's records.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.
James Court Water System: frequently asked questions
Who runs James Court Water System?
James Court Water System (PWSID CA4901445) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does James Court Water System serve?
James Court Water System reports serving 208 people through 40 service connections in Sonoma County, California.
Where does James Court Water System 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 James Court Water System have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in April 2019. 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 James Court Water System'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 one violation for this system; it is health-based, and the most recent began in April 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find James Court Water System's water quality report?
As a community water system, James Court Water System 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 |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “James Court Water System, PWSID CA4901445, California”, https://aquacensus.com/water-systems/california/james-court-water-system-ca4901445 (data as of October 1, 2026).