Public water system · CA4810701
ActiveCalifornia Water Service Co.-Travis Afb
At a glance
California Water Service Co.-Travis Afb (PWSID CA4810701) is an active community water system in Solano County, California. It reports serving 18,111 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. EPA's records list 9 violations for this system; all are health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
18,111
Service connections
1
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does California Water Service Co.-Travis Afb compare with other water systems in Solano County?
By EPA's size categories, California Water Service Co.-Travis Afb is a large system (10,001 to 100,000 people). Solano County has 63 active public water systems, and California Water Service Co.-Travis Afb is the 6th-largest of them by population served. Its population served is about 141% above the county average of 7,509 people per system, and accounts for 3.8% of the 473,083 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 California Water Service Co.-Travis Afb is about 170% above 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates California Water Service Co.-Travis Afb?
EPA lists California Water Service Co.-Travis Afb as owned by the federal 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. 1 of the 63 active systems in Solano County (1.6%) are also owned by the federal government.
Does California Water Service Co.-Travis Afb have drinking water violations?
EPA's records list 9 violations for this system; all are health-based, and the most recent began in July 2015. The violations listed here began between June 1992 and July 2015. By type: 8 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (7 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 1999-03-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1996-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1995-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
California Water Service Co.-Travis Afb: frequently asked questions
Who runs California Water Service Co.-Travis Afb?
California Water Service Co.-Travis Afb (PWSID CA4810701) is a community water system owned by the federal government. It is regulated by the CA state drinking water program.
How many people does California Water Service Co.-Travis Afb serve?
California Water Service Co.-Travis Afb reports serving 18,111 people through 1 service connection in Solano County, California.
Where does California Water Service Co.-Travis Afb get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does California Water Service Co.-Travis Afb have any drinking water violations?
EPA's records list 9 violations for this system; all are health-based, and the most recent began in July 2015. 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 California Water Service Co.-Travis Afb'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 9 violations for this system; all are health-based, and the most recent began in July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find California Water Service Co.-Travis Afb's water quality report?
As a community water system, California Water Service Co.-Travis Afb 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 Solano County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Vallejo | Solano | 121,420 | Community | Surface water |
| City of Fairfield | Solano | 120,377 | Community | Surface water |
| City of Vacaville | Solano | 99,650 | Community | Surface water |
| Suisun-Solano Water Authority | Solano | 29,105 | Community | Surface water |
| City of Benicia | Solano | 27,131 | Community | Surface water |
| City of Dixon | Solano | 12,540 | 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, “California Water Service Co.-Travis Afb, PWSID CA4810701, California”, https://aquacensus.com/water-systems/california/california-water-service-co-travis-afb-ca4810701 (data as of October 1, 2026).