Public water system · CA4000714
ActiveSanta Margarita Recreation Area
At a glance
Santa Margarita Recreation Area (PWSID CA4000714) is an active transient non-community water system in San Luis Obispo County, California. It reports serving 50,001 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50,001
Service connections
8
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Santa Margarita Recreation Area compare with other water systems in San Luis Obispo County?
By EPA's size categories, Santa Margarita Recreation Area is a large system (10,001 to 100,000 people). San Luis Obispo County has 171 active public water systems, and Santa Margarita Recreation Area is the largest of them by population served. Its population served is about 25 times the county average of 2,038 people per system, and accounts for 14% 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 Santa Margarita Recreation Area is about 347 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 Santa Margarita Recreation Area?
EPA lists Santa Margarita Recreation Area 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. 33 of the 171 active systems in San Luis Obispo County (19%) are also owned by a local government.
Does Santa Margarita Recreation Area have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Santa Margarita Recreation Area. For the latest compliance status, check EPA ECHO for current compliance history.
Santa Margarita Recreation Area: frequently asked questions
Who runs Santa Margarita Recreation Area?
Santa Margarita Recreation Area (PWSID CA4000714) 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 Santa Margarita Recreation Area serve?
Santa Margarita Recreation Area reports serving 50,001 people through 8 service connections in San Luis Obispo County, California.
Where does Santa Margarita Recreation Area 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 Santa Margarita Recreation Area have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Santa Margarita Recreation Area'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the CA state drinking water program.
Where can I find Santa Margarita Recreation Area's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Santa Margarita Recreation Area 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 |
|---|---|---|---|---|
| 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 |
| Nipomo Comm Services Dist | San Luis Obispo | 13,771 | 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, “Santa Margarita Recreation Area, PWSID CA4000714, California”, https://aquacensus.com/water-systems/california/santa-margarita-recreation-area-ca4000714 (data as of October 1, 2026).