Public water system · CA3410021
ActiveSan Juan Water District
At a glance
San Juan Water District (PWSID CA3410021) is an active community water system in Sacramento County, California. It reports serving 29,598 people through 11,031 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in November 1989.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
29,598
Service connections
11,031
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does San Juan Water District compare with other water systems in Sacramento County?
By EPA's size categories, San Juan Water District is a large system (10,001 to 100,000 people). Sacramento County has 164 active public water systems. Its population served is about 187% above the county average of 10,325 people per system, and accounts for 1.7% of the 1,693,284 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 San Juan Water District is about 4.4 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates San Juan Water District?
EPA lists San Juan Water District 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. 37 of the 164 active systems in Sacramento County (23%) are also owned by a local government.
Does San Juan Water District have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in November 1989. The violations listed here began between September 1989 and November 1989. By type: 2 public notice, recordkeeping or other. EPA lists 2 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1989-11-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
| 1989-09-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
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.
San Juan Water District: frequently asked questions
Who runs San Juan Water District?
San Juan Water District (PWSID CA3410021) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does San Juan Water District serve?
San Juan Water District reports serving 29,598 people through 11,031 service connections in Sacramento County, California.
Where does San Juan Water District get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does San Juan Water District have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in November 1989. 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 San Juan Water District'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; none is health-based, and the most recent began in November 1989. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find San Juan Water District's water quality report?
As a community water system, San Juan Water District 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 Sacramento County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Sacramento Main | Sacramento | 527,979 | Community | Surface water |
| Sacramento Suburban Water District | Sacramento | 194,444 | Community | Purchased surface water |
| Scwa - Laguna/Vineyard | Sacramento | 184,896 | Community | Surface water |
| Folsom, City of - Main | Sacramento | 80,969 | Community | Surface water |
| Citrus Heights Water District | Sacramento | 67,818 | Community | Purchased surface water |
| Cal Am - Suburban Rosemont | Sacramento | 54,793 | 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, “San Juan Water District, PWSID CA3410021, California”, https://aquacensus.com/water-systems/california/san-juan-water-district-ca3410021 (data as of October 1, 2026).