Public water system · CA2400088
ActiveHenderson County Park
At a glance
Henderson County Park (PWSID CA2400088) is an active transient non-community water system in Merced County, California. It reports serving 230 people through 6 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
230
Service connections
6
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Henderson County Park compare with other water systems in Merced County?
By EPA's size categories, Henderson County Park is a very small system (500 people or fewer). Merced County has 120 active public water systems. Its population served is well below the county average of 2,228 people per system, and accounts for less than 0.1% of the 267,324 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 Henderson County Park is about 60% above 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 Henderson County Park?
EPA lists Henderson 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. 30 of the 120 active systems in Merced County (25%) are also owned by a local government.
Does Henderson County Park have drinking water violations?
EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2015. The violations listed here began between May 1998 and January 2015. By type: 8 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (8 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2015-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2014-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
Henderson County Park: frequently asked questions
Who runs Henderson County Park?
Henderson County Park (PWSID CA2400088) 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 Henderson County Park serve?
Henderson County Park reports serving 230 people through 6 service connections in Merced County, California.
Where does Henderson 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 Henderson County Park have any drinking water violations?
EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2015. 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 Henderson 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 9 violations for this system; 8 are health-based, and the most recent began in January 2015. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Henderson County Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Henderson 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 Merced County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| City of Merced | Merced | 93,692 | Community | Groundwater |
| City of Los Banos | Merced | 47,419 | Community | Groundwater |
| City of Atwater | Merced | 29,479 | Community | Groundwater |
| City of Livingston | Merced | 14,894 | Community | Groundwater |
| Winton Water & Sanitary Dist | Merced | 9,745 | Community | Groundwater |
| Delhi Cwd | Merced | 7,784 | 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, “Henderson County Park, PWSID CA2400088, California”, https://aquacensus.com/water-systems/california/henderson-county-park-ca2400088 (data as of October 1, 2026).