Public water system · CA4010010
ActiveSan Miguel Community Services District
At a glance
San Miguel Community Services District (PWSID CA4010010) is an active community water system in San Luis Obispo County, California. It reports serving 2,600 people through 907 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 March 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,600
Service connections
907
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does San Miguel Community Services District compare with other water systems in San Luis Obispo County?
By EPA's size categories, San Miguel Community Services District is a small system (501 to 3,300 people). San Luis Obispo County has 171 active public water systems. Its population served is about 28% above the county average of 2,038 people per system, and accounts for 0.7% 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 community water system reports serving 6,703 people, so San Miguel Community Services District is about 61% below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. California has 2,997 active 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 San Miguel Community Services District?
EPA lists San Miguel Community Services District 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 San Miguel Community Services District have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in March 2007. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). 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 |
|---|---|---|---|---|
| 2007-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
San Miguel Community Services District: frequently asked questions
Who runs San Miguel Community Services District?
San Miguel Community Services District (PWSID CA4010010) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does San Miguel Community Services District serve?
San Miguel Community Services District reports serving 2,600 people through 907 service connections in San Luis Obispo County, California.
Where does San Miguel Community Services District 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 San Miguel Community Services District 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 March 2007. 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 San Miguel Community Services District'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 not health-based, and the most recent began in March 2007. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find San Miguel Community Services District's water quality report?
As a community water system, San Miguel Community Services District must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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 |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “San Miguel Community Services District, PWSID CA4010010, California”, https://aquacensus.com/water-systems/california/san-miguel-community-services-district-ca4010010 (data as of October 1, 2026).