Public water system · CA2400170
ActiveHilmar Cheese Company
At a glance
Hilmar Cheese Company (PWSID CA2400170) is an active non-transient non-community water system in Merced County, California. It reports serving 1,629 people through 4 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 7 violations for this system; all are health-based, and the most recent began in January 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,629
Service connections
4
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Hilmar Cheese Company compare with other water systems in Merced County?
By EPA's size categories, Hilmar Cheese Company is a small system (501 to 3,300 people). Merced County has 120 active public water systems. Its population served is about 27% below the county average of 2,228 people per system, and accounts for 0.6% 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 non-transient non-community water system reports serving 430 people, so Hilmar Cheese Company is about 3.8 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. California has 1,466 active non-transient non-community water systems, 20% 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 Hilmar Cheese Company?
EPA lists Hilmar Cheese Company 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. 80 of the 120 active systems in Merced County (67%) are also privately owned.
Does Hilmar Cheese Company have drinking water violations?
EPA's records list 7 violations for this system; all are health-based, and the most recent began in January 2016. The violations listed here began between January 2015 and January 2016. By type: 7 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (7 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 |
|---|---|---|---|---|
| 2016-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2015-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | 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.
Hilmar Cheese Company: frequently asked questions
Who runs Hilmar Cheese Company?
Hilmar Cheese Company (PWSID CA2400170) is a non-transient non-community water system privately owned. It is regulated by the CA state drinking water program.
How many people does Hilmar Cheese Company serve?
Hilmar Cheese Company reports serving 1,629 people through 4 service connections in Merced County, California.
Where does Hilmar Cheese Company 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 Hilmar Cheese Company have any drinking water violations?
EPA's records list 7 violations for this system; all are health-based, and the most recent began in January 2016. 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 Hilmar Cheese Company'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 7 violations for this system; all are health-based, and the most recent began in January 2016. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Hilmar Cheese Company's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hilmar Cheese Company is a non-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, “Hilmar Cheese Company, PWSID CA2400170, California”, https://aquacensus.com/water-systems/california/hilmar-cheese-company-ca2400170 (data as of October 1, 2026).