Public water system · CA4300612
ActiveMt. Madonna County Park
At a glance
Mt. Madonna County Park (PWSID CA4300612) is an active transient non-community water system in Santa Clara County, California. It reports serving 621 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in August 1984.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
621
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mt. Madonna County Park compare with other water systems in Santa Clara County?
By EPA's size categories, Mt. Madonna County Park is a small system (501 to 3,300 people). Santa Clara County has 121 active public water systems. Its population served is well below the county average of 17,334 people per system, and accounts for less than 0.1% of the 2,097,447 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 Mt. Madonna County Park is about 4.3 times 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 Mt. Madonna County Park?
EPA lists Mt. Madonna County Park 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. 34 of the 121 active systems in Santa Clara County (28%) are also owned by a local government.
Does Mt. Madonna County Park have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in August 1984. By type: 1 public notice, recordkeeping or other. EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1984-08-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
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.
Mt. Madonna County Park: frequently asked questions
Who runs Mt. Madonna County Park?
Mt. Madonna County Park (PWSID CA4300612) is a transient non-community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Mt. Madonna County Park serve?
Mt. Madonna County Park reports serving 621 people through 2 service connections in Santa Clara County, California.
Where does Mt. Madonna County Park 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 Mt. Madonna County Park 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 August 1984. 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 Mt. Madonna County Park'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 August 1984. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mt. Madonna County Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mt. Madonna County Park 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 Santa Clara County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Jose Water | Santa Clara | 1,039,920 | Community | Surface water |
| City of Sunnyvale | Santa Clara | 157,566 | Community | Purchased surface water |
| City of Santa Clara | Santa Clara | 130,746 | Community | Purchased surface water |
| Great Oaks Wc Inc. | Santa Clara | 110,088 | Community | Groundwater |
| City of San Jose - Evg/Edv/Coy | Santa Clara | 101,265 | Community | Purchased surface water |
| City of Milpitas | Santa Clara | 81,773 | 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, “Mt. Madonna County Park, PWSID CA4300612, California”, https://aquacensus.com/water-systems/california/mt-madonna-county-park-ca4300612 (data as of October 1, 2026).