Public water system · CA3910011
ActiveTracy, City of
At a glance
City of Tracy (PWSID CA3910011) is an active community water system in San Joaquin County, California. It reports serving 96,609 people through 27,545 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in July 2001.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
96,609
Service connections
27,545
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does City of Tracy compare with other water systems in San Joaquin County?
By EPA's size categories, City of Tracy is a large system (10,001 to 100,000 people). San Joaquin County has 302 active public water systems, and City of Tracy is the 3rd-largest of them by population served. Its population served is about 38 times the county average of 2,571 people per system, and accounts for 12% of the 776,334 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 City of Tracy is about 14 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 City of Tracy?
EPA lists City of Tracy 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. 69 of the 302 active systems in San Joaquin County (23%) are also owned by a local government.
Does City of Tracy have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in July 2001. The violations listed here began between September 1992 and July 2001. By type: 1 public notice, recordkeeping or other, 1 monitoring and reporting, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminants or rules involved are Consumer Confidence Rule, Total coliform bacteria (TCR), Surface Water Treatment Rule and Total trihalomethanes (TTHM). EPA lists 4 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 |
|---|---|---|---|---|
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-05-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1992-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
All 4 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.
City of Tracy: frequently asked questions
Who runs City of Tracy?
City of Tracy (PWSID CA3910011) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does City of Tracy serve?
City of Tracy reports serving 96,609 people through 27,545 service connections in San Joaquin County, California.
Where does City of Tracy 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 City of Tracy have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in July 2001. 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 City of Tracy'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 4 violations for this system; 2 are health-based, and the most recent began in July 2001. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find City of Tracy's water quality report?
As a community water system, City of Tracy 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 San Joaquin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Stockton | San Joaquin | 191,302 | Community | Surface water |
| California Water Service - Stockton | San Joaquin | 176,266 | Community | Purchased surface water |
| Manteca, City of | San Joaquin | 84,928 | Community | Purchased surface water |
| Lodi, City of | San Joaquin | 68,272 | Community | Surface water |
| City of Lathrop | San Joaquin | 35,080 | Community | Purchased surface water |
| City of Mountain House | San Joaquin | 24,948 | Community | 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, “Tracy, City of, PWSID CA3910011, California”, https://aquacensus.com/water-systems/california/tracy-city-of-ca3910011 (data as of October 1, 2026).