Public water system · CA5700556
ActiveCaltrans-Dunigan Rs
At a glance
Caltrans-Dunigan Rs (PWSID CA5700556) is an active transient non-community water system in Yolo County, California. It reports serving 1,000 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,000
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Caltrans-Dunigan Rs compare with other water systems in Yolo County?
By EPA's size categories, Caltrans-Dunigan Rs is a small system (501 to 3,300 people). Yolo County has 88 active public water systems. Its population served is about 66% below the county average of 2,951 people per system, and accounts for 0.4% of the 259,714 people reported by systems filed under the county. Across California, the 7,479 active systems average 5,706 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Caltrans-Dunigan Rs is about 6.9 times that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. California has 3,016 active transient non-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 Caltrans-Dunigan Rs?
EPA lists Caltrans-Dunigan Rs as owned by a state 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. 3 of the 88 active systems in Yolo County (3.4%) are also owned by a state government.
Does Caltrans-Dunigan Rs 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 Caltrans-Dunigan Rs. For the latest compliance status, check EPA ECHO for current compliance history.
Caltrans-Dunigan Rs: frequently asked questions
Who runs Caltrans-Dunigan Rs?
Caltrans-Dunigan Rs (PWSID CA5700556) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Caltrans-Dunigan Rs serve?
Caltrans-Dunigan Rs reports serving 1,000 people through 4 service connections in Yolo County, California.
Where does Caltrans-Dunigan Rs 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 Caltrans-Dunigan Rs have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Caltrans-Dunigan Rs' 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 EPA ECHO, or the CA state drinking water program.
Where can I find Caltrans-Dunigan Rs' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Caltrans-Dunigan Rs is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Yolo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Davis | Yolo | 67,457 | Community | Purchased surface water |
| City of Woodland | Yolo | 61,462 | Community | Purchased surface water |
| City of West Sacramento | Yolo | 53,355 | Community | Surface water |
| Uc - Davis | Yolo | 49,616 | Community | Purchased surface water |
| City of Winters | Yolo | 7,115 | Community | Groundwater |
| Esparto C.S.D. | Yolo | 3,574 | 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, “Caltrans-Dunigan Rs, PWSID CA5700556, California”, https://aquacensus.com/water-systems/california/caltrans-dunigan-rs-ca5700556 (data as of October 1, 2026).