Public water system · CA2400057
ActiveCal Trans Erreca Rest Area
At a glance
Cal Trans Erreca Rest Area (PWSID CA2400057) is an active transient non-community water system in Merced County, California. It reports serving 6,150 people through 4 service connections. Its primary water source is surface water, and EPA lists it as owned by a state government. EPA's records list 4 violations for this system; none is health-based, and the most recent began in February 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
6,150
Service connections
4
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Cal Trans Erreca Rest Area compare with other water systems in Merced County?
By EPA's size categories, Cal Trans Erreca Rest Area is a medium system (3,301 to 10,000 people). Merced County has 120 active public water systems. Its population served is about 176% above the county average of 2,228 people per system, and accounts for 2.3% of the 267,324 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 Cal Trans Erreca Rest Area is about 43 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. 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 Cal Trans Erreca Rest Area?
EPA lists Cal Trans Erreca Rest Area 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. 8 of the 120 active systems in Merced County (6.7%) are also owned by a state government.
Does Cal Trans Erreca Rest Area have drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in February 2016. The violations listed here began between October 2004 and February 2016. By type: 4 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). 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 |
|---|---|---|---|---|
| 2016-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2006-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | 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.
Cal Trans Erreca Rest Area: frequently asked questions
Who runs Cal Trans Erreca Rest Area?
Cal Trans Erreca Rest Area (PWSID CA2400057) 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 Cal Trans Erreca Rest Area serve?
Cal Trans Erreca Rest Area reports serving 6,150 people through 4 service connections in Merced County, California.
Where does Cal Trans Erreca Rest Area 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 Cal Trans Erreca Rest Area have any drinking water violations?
EPA's records list 4 violations for this system; none is health-based, and the most recent began in February 2016. 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 Cal Trans Erreca Rest Area'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; none is health-based, and the most recent began in February 2016. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Cal Trans Erreca Rest Area's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cal Trans Erreca Rest Area 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 Merced County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Merced | Merced | 93,692 | Community | Groundwater |
| City of Los Banos | Merced | 47,419 | Community | Groundwater |
| City of Atwater | Merced | 29,479 | Community | Groundwater |
| City of Livingston | Merced | 14,894 | Community | Groundwater |
| Winton Water & Sanitary Dist | Merced | 9,745 | Community | Groundwater |
| Delhi Cwd | Merced | 7,784 | 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, “Cal Trans Erreca Rest Area, PWSID CA2400057, California”, https://aquacensus.com/water-systems/california/cal-trans-erreca-rest-area-ca2400057 (data as of October 1, 2026).