Public water system · CA4010301
ActiveHearst Memorial State Beach
At a glance
Hearst Memorial State Beach (PWSID CA4010301) is an active transient non-community water system in San Luis Obispo County, California. It reports serving 500 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's records list one violation for this system; it is health-based, and the most recent began in June 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
1
Primary source
SWP
Purchased surface water
System type
TNCWS
Transient non-community water system
System record
How does Hearst Memorial State Beach compare with other water systems in San Luis Obispo County?
By EPA's size categories, Hearst Memorial State Beach is a very small system (500 people or fewer). San Luis Obispo County has 171 active public water systems. Its population served is well below the county average of 2,038 people per system, and accounts for 0.1% of the 348,510 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 Hearst Memorial State Beach 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 506 California systems (6.8%) list purchased surface water as their primary source.
Who owns and regulates Hearst Memorial State Beach?
EPA lists Hearst Memorial State Beach as owned by a state 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. 6 of the 171 active systems in San Luis Obispo County (3.5%) are also owned by a state government.
Does Hearst Memorial State Beach have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 1994. By type: 1 required treatment not met. The contaminant or rule involved is Surface Water Treatment 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 |
|---|---|---|---|---|
| 1994-06-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | 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.
Hearst Memorial State Beach: frequently asked questions
Who runs Hearst Memorial State Beach?
Hearst Memorial State Beach (PWSID CA4010301) is a transient non-community water system owned by a state government. It is regulated by the CA state drinking water program.
How many people does Hearst Memorial State Beach serve?
Hearst Memorial State Beach reports serving 500 people through 1 service connection in San Luis Obispo County, California.
Where does Hearst Memorial State Beach get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Hearst Memorial State Beach have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in June 1994. 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 Hearst Memorial State Beach'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 health-based, and the most recent began in June 1994. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Hearst Memorial State Beach's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Hearst Memorial State Beach 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 San Luis Obispo County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Santa Margarita Recreation Area | San Luis Obispo | 50,001 | Transient non-community | Groundwater |
| San Luis Obispo Water Department | San Luis Obispo | 47,788 | Community | Surface water |
| City of Paso Robles Water Division | San Luis Obispo | 31,176 | Community | Surface water |
| Atascadero Mutual Water Co | San Luis Obispo | 30,618 | Community | Groundwater |
| City of Arroyo Grande Utilities Division | San Luis Obispo | 17,963 | Community | Purchased surface water |
| California Mens Colony | San Luis Obispo | 15,000 | Community | 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, “Hearst Memorial State Beach, PWSID CA4010301, California”, https://aquacensus.com/water-systems/california/hearst-memorial-state-beach-ca4010301 (data as of October 1, 2026).