Public water system · CA2010003
ActiveCal Am - Bass Lake
At a glance
Cal Am - Bass Lake (PWSID CA2010003) is an active community water system in Madera County, California. It reports serving 4,527 people through 1,010 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,527
Service connections
1,010
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Cal Am - Bass Lake compare with other water systems in Madera County?
By EPA's size categories, Cal Am - Bass Lake is a medium system (3,301 to 10,000 people). Madera County has 202 active public water systems. Its population served is about 4.9 times the county average of 915 people per system, and accounts for 2.5% of the 184,760 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 Cal Am - Bass Lake is about 32% 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 Cal Am - Bass Lake?
EPA lists Cal Am - Bass Lake as privately owned. 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. 139 of the 202 active systems in Madera County (69%) are also privately owned.
Does Cal Am - Bass Lake have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2006. The violations listed here began between June 1993 and January 2006. By type: 1 contaminant level above the legal limit, 1 monitoring and reporting and 1 required treatment not met. The contaminants or rules involved are Combined Uranium, Lead and Copper Rule and Surface Water Treatment Rule. EPA lists 3 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 |
|---|---|---|---|---|
| 2006-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Uraniumcode 4006 | Yes | Resolved |
| 1996-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1993-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
All 3 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 Am - Bass Lake: frequently asked questions
Who runs Cal Am - Bass Lake?
Cal Am - Bass Lake (PWSID CA2010003) is a community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Cal Am - Bass Lake serve?
Cal Am - Bass Lake reports serving 4,527 people through 1,010 service connections in Madera County, California.
Where does Cal Am - Bass Lake 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 Am - Bass Lake have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in January 2006. 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 Am - Bass Lake'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 3 violations for this system; 2 are health-based, and the most recent began in January 2006. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Cal Am - Bass Lake's water quality report?
As a community water system, Cal Am - Bass Lake 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 Madera County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Madera | Madera | 66,560 | Community | Groundwater |
| Chowchilla City Water Dept | Madera | 13,916 | Community | Groundwater |
| Lupine Bass Lake | Madera | 11,930 | Transient non-community | Groundwater |
| Madera Valley Water Company | Madera | 6,494 | Community | Groundwater |
| Riverstone/Rootcreek Water District | Madera | 5,507 | Community | Groundwater |
| Yosemite Spring Park Util Co | Madera | 5,300 | 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 Am - Bass Lake, PWSID CA2010003, California”, https://aquacensus.com/water-systems/california/cal-am-bass-lake-ca2010003 (data as of October 1, 2026).