Public water system · CA0600050
ActiveCaltrans-Maxwell Reststops
At a glance
Caltrans-Maxwell Reststops (PWSID CA0600050) is an active transient non-community water system in Colusa County, California. It reports serving 15,000 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
15,000
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Caltrans-Maxwell Reststops compare with other water systems in Colusa County?
By EPA's size categories, Caltrans-Maxwell Reststops is a large system (10,001 to 100,000 people). Colusa County has 29 active public water systems, and Caltrans-Maxwell Reststops is the largest of them by population served. Its population served is about 12 times the county average of 1,211 people per system, and accounts for 43% of the 35,121 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-Maxwell Reststops is about 104 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-Maxwell Reststops?
EPA lists Caltrans-Maxwell Reststops 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. 1 of the 29 active systems in Colusa County (3.4%) are also owned by a state government.
Does Caltrans-Maxwell Reststops have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2017. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
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.
Caltrans-Maxwell Reststops: frequently asked questions
Who runs Caltrans-Maxwell Reststops?
Caltrans-Maxwell Reststops (PWSID CA0600050) 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-Maxwell Reststops serve?
Caltrans-Maxwell Reststops reports serving 15,000 people through 2 service connections in Colusa County, California.
Where does Caltrans-Maxwell Reststops 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-Maxwell Reststops have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2017. 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 Caltrans-Maxwell Reststops' 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 not health-based, and the most recent began in January 2017. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Caltrans-Maxwell Reststops' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Caltrans-Maxwell Reststops 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 Colusa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Colusa | Colusa | 6,447 | Community | Groundwater |
| City of Williams | Colusa | 5,538 | Community | Groundwater |
| Arbuckle Public Utility District | Colusa | 2,778 | Community | Groundwater |
| Maxwell Public Utility District | Colusa | 1,175 | Community | Groundwater |
| Colusa Industrial Properties | Colusa | 533 | Non-transient non-community | Groundwater |
| Menf-Fouts Springs Cg | Colusa | 531 | Transient non-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-Maxwell Reststops, PWSID CA0600050, California”, https://aquacensus.com/water-systems/california/caltrans-maxwell-reststops-ca0600050 (data as of October 1, 2026).