Public water system · CA3110124
ActivePlacer Cwa - Monte Vista
At a glance
Placer Cwa - Monte Vista (PWSID CA3110124) is an active community water system in Placer County, California. It reports serving 46 people through 17 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 1993.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
46
Service connections
17
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Placer Cwa - Monte Vista compare with other water systems in Placer County?
By EPA's size categories, Placer Cwa - Monte Vista is a very small system (500 people or fewer). Placer County has 116 active public water systems. Its population served is well below the county average of 3,692 people per system, and accounts for less than 0.1% of the 428,242 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 Placer Cwa - Monte Vista is well below 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. 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 Placer Cwa - Monte Vista?
EPA lists Placer Cwa - Monte Vista as owned by a local 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. 35 of the 116 active systems in Placer County (30%) are also owned by a local government.
Does Placer Cwa - Monte Vista have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 1993. The violations listed here began between January 1992 and June 1993. By type: 2 required treatment not met. The contaminant or rule involved most often is Surface Water Treatment Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 1993-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1992-01-01 | Required treatment not metFailure to Filter (SWTR) · code 42 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 2 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.
Placer Cwa - Monte Vista: frequently asked questions
Who runs Placer Cwa - Monte Vista?
Placer Cwa - Monte Vista (PWSID CA3110124) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Placer Cwa - Monte Vista serve?
Placer Cwa - Monte Vista reports serving 46 people through 17 service connections in Placer County, California.
Where does Placer Cwa - Monte Vista 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 Placer Cwa - Monte Vista have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 1993. 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 Placer Cwa - Monte Vista'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 2 violations for this system; all are health-based, and the most recent began in June 1993. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Placer Cwa - Monte Vista's water quality report?
As a community water system, Placer Cwa - Monte Vista 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 Placer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Roseville | Placer | 155,612 | Community | Surface water |
| Placer Cwa - Foothill | Placer | 89,544 | Community | Surface water |
| City of Lincoln | Placer | 54,538 | Community | Purchased surface water |
| Placer Cwa - Auburn/Bowman | Placer | 27,294 | Community | Surface water |
| Northstar C.S.D. | Placer | 15,452 | Community | Surface water |
| Cal Am - West Placer | Placer | 8,861 | Community | Purchased surface water |
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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, “Placer Cwa - Monte Vista, PWSID CA3110124, California”, https://aquacensus.com/water-systems/california/placer-cwa-monte-vista-ca3110124 (data as of October 1, 2026).