Public water system · CA2300950
ActiveMendocino County Fairgrounds
At a glance
Mendocino County Fairgrounds (PWSID CA2300950) is an active transient non-community water system in Mendocino County, California. It reports serving 500 people through 10 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 April 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
10
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mendocino County Fairgrounds compare with other water systems in Mendocino County?
By EPA's size categories, Mendocino County Fairgrounds is a very small system (500 people or fewer). Mendocino County has 144 active public water systems. Its population served is about 13% below the county average of 576 people per system, and accounts for 0.6% of the 82,868 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 Mendocino County Fairgrounds is about 3.5 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 Mendocino County Fairgrounds?
EPA lists Mendocino County Fairgrounds 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. 26 of the 144 active systems in Mendocino County (18%) are also owned by a local government.
Does Mendocino County Fairgrounds have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in April 2022. By type: 1 monitoring. The contaminant or rule involved is Revised Total Coliform Rule. 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 |
|---|---|---|---|---|
| 2022-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Mendocino County Fairgrounds: frequently asked questions
Who runs Mendocino County Fairgrounds?
Mendocino County Fairgrounds (PWSID CA2300950) 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 Mendocino County Fairgrounds serve?
Mendocino County Fairgrounds reports serving 500 people through 10 service connections in Mendocino County, California.
Where does Mendocino County Fairgrounds 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 Mendocino County Fairgrounds 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 April 2022. 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 Mendocino County Fairgrounds' 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 April 2022. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Mendocino County Fairgrounds' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mendocino County Fairgrounds 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 Mendocino County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ukiah, City of | Mendocino | 16,607 | Community | Surface water |
| Fort Bragg, City of | Mendocino | 6,919 | Community | Surface water |
| Willits, City of | Mendocino | 6,175 | Community | Surface water |
| Millview County Water District | Mendocino | 5,500 | Community | Surface water |
| Redwood Valley County Water District | Mendocino | 5,200 | Community | Surface water |
| Willow County Water District | Mendocino | 3,797 | 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, “Mendocino County Fairgrounds, PWSID CA2300950, California”, https://aquacensus.com/water-systems/california/mendocino-county-fairgrounds-ca2300950 (data as of October 1, 2026).