Public water system · CA2010008
ActiveMadera Co Md10a-Madera Ranchos
At a glance
Madera Co Md10a-Madera Ranchos (PWSID CA2010008) is an active community water system in Madera County, California. It reports serving 3,172 people through 946 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in April 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,172
Service connections
946
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Madera Co Md10a-Madera Ranchos compare with other water systems in Madera County?
By EPA's size categories, Madera Co Md10a-Madera Ranchos is a small system (501 to 3,300 people). Madera County has 202 active public water systems. Its population served is about 3.5 times the county average of 915 people per system, and accounts for 1.7% 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 Madera Co Md10a-Madera Ranchos is about half of 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. 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 Madera Co Md10a-Madera Ranchos?
EPA lists Madera Co Md10a-Madera Ranchos 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. 46 of the 202 active systems in Madera County (23%) are also owned by a local government.
Does Madera Co Md10a-Madera Ranchos have drinking water violations?
EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in April 2014. The violations listed here began between July 1993 and April 2014. By type: 5 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2014-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2004-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2001-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51 | Lead and Copper Rulecode 5000 | No | Resolved |
All 7 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.
Madera Co Md10a-Madera Ranchos: frequently asked questions
Who runs Madera Co Md10a-Madera Ranchos?
Madera Co Md10a-Madera Ranchos (PWSID CA2010008) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Madera Co Md10a-Madera Ranchos serve?
Madera Co Md10a-Madera Ranchos reports serving 3,172 people through 946 service connections in Madera County, California.
Where does Madera Co Md10a-Madera Ranchos 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 Madera Co Md10a-Madera Ranchos have any drinking water violations?
EPA's records list 7 violations for this system; 5 are health-based, and the most recent began in April 2014. 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 Madera Co Md10a-Madera Ranchos' 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 7 violations for this system; 5 are health-based, and the most recent began in April 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Madera Co Md10a-Madera Ranchos' water quality report?
As a community water system, Madera Co Md10a-Madera Ranchos 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, “Madera Co Md10a-Madera Ranchos, PWSID CA2010008, California”, https://aquacensus.com/water-systems/california/madera-co-md10a-madera-ranchos-ca2010008 (data as of October 1, 2026).