Public water system · CA2000670
ActivePg&E Ag Wishon Powerhouse
At a glance
Pg&E Ag Wishon Powerhouse (PWSID CA2000670) is an active transient non-community water system in Madera County, California. It reports serving 26 people through 9 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
26
Service connections
9
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Pg&E Ag Wishon Powerhouse compare with other water systems in Madera County?
By EPA's size categories, Pg&E Ag Wishon Powerhouse is a very small system (500 people or fewer). Madera County has 202 active public water systems. Its population served is well below the county average of 915 people per system, and accounts for less than 0.1% 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 transient non-community water system reports serving 144 people, so Pg&E Ag Wishon Powerhouse is well below 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. 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 Pg&E Ag Wishon Powerhouse?
EPA lists Pg&E Ag Wishon Powerhouse 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 Pg&E Ag Wishon Powerhouse have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2010. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 2010-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
The one violation in EPA's records.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.
Pg&E Ag Wishon Powerhouse: frequently asked questions
Who runs Pg&E Ag Wishon Powerhouse?
Pg&E Ag Wishon Powerhouse (PWSID CA2000670) is a transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Pg&E Ag Wishon Powerhouse serve?
Pg&E Ag Wishon Powerhouse reports serving 26 people through 9 service connections in Madera County, California.
Where does Pg&E Ag Wishon Powerhouse 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 Pg&E Ag Wishon Powerhouse have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2010. 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 Pg&E Ag Wishon Powerhouse'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 one violation for this system; it is not health-based, and the most recent began in January 2010. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Pg&E Ag Wishon Powerhouse's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Pg&E Ag Wishon Powerhouse 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 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, “Pg&E Ag Wishon Powerhouse, PWSID CA2000670, California”, https://aquacensus.com/water-systems/california/pg-e-ag-wishon-powerhouse-ca2000670 (data as of October 1, 2026).