Public water system · CA2410303
ActiveCdpr Four Rivers District-Basalt
At a glance
Cdpr Four Rivers District-Basalt (PWSID CA2410303) is an active transient non-community water system in Merced County, California. It reports serving 363 people through 6 service connections. Its primary water source is surface water, and EPA lists it as owned by a state government. EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
363
Service connections
6
Primary source
SW
Surface water
System type
TNCWS
Transient non-community water system
System record
How does Cdpr Four Rivers District-Basalt compare with other water systems in Merced County?
By EPA's size categories, Cdpr Four Rivers District-Basalt is a very small system (500 people or fewer). Merced County has 120 active public water systems. Its population served is well below the county average of 2,228 people per system, and accounts for 0.1% 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 Cdpr Four Rivers District-Basalt is about 152% above 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 Cdpr Four Rivers District-Basalt?
EPA lists Cdpr Four Rivers District-Basalt 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 Cdpr Four Rivers District-Basalt have drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2020. The violations listed here began between January 2002 and January 2020. By type: 5 monitoring and reporting. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2020-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2006-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 5 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.
Cdpr Four Rivers District-Basalt: frequently asked questions
Who runs Cdpr Four Rivers District-Basalt?
Cdpr Four Rivers District-Basalt (PWSID CA2410303) 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 Cdpr Four Rivers District-Basalt serve?
Cdpr Four Rivers District-Basalt reports serving 363 people through 6 service connections in Merced County, California.
Where does Cdpr Four Rivers District-Basalt 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 Cdpr Four Rivers District-Basalt have any drinking water violations?
EPA's records list 5 violations for this system; none is health-based, and the most recent began in January 2020. 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 Cdpr Four Rivers District-Basalt'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 5 violations for this system; none is health-based, and the most recent began in January 2020. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Cdpr Four Rivers District-Basalt's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cdpr Four Rivers District-Basalt 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, “Cdpr Four Rivers District-Basalt, PWSID CA2410303, California”, https://aquacensus.com/water-systems/california/cdpr-four-rivers-district-basalt-ca2410303 (data as of October 1, 2026).