Public water system · CA4010011
ActiveMorro Bay Pw Dept - Water Division
At a glance
Morro Bay Pw Dept - Water Division (PWSID CA4010011) is an active community water system in San Luis Obispo County, California. It reports serving 13,757 people through 5,612 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; all are health-based, and the most recent began in November 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
13,757
Service connections
5,612
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Morro Bay Pw Dept - Water Division compare with other water systems in San Luis Obispo County?
By EPA's size categories, Morro Bay Pw Dept - Water Division is a large system (10,001 to 100,000 people). San Luis Obispo County has 171 active public water systems. Its population served is about 6.7 times the county average of 2,038 people per system, and accounts for 3.9% 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 Morro Bay Pw Dept - Water Division is about twice 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. 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 Morro Bay Pw Dept - Water Division?
EPA lists Morro Bay Pw Dept - Water Division 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 Morro Bay Pw Dept - Water Division have drinking water violations?
EPA's records list 5 violations for this system; all are health-based, and the most recent began in November 2006. The violations listed here began between February 1993 and November 2006. By type: 4 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 5 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 |
|---|---|---|---|---|
| 2006-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | Yes | Resolved |
| 2001-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1998-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Required treatment not metTreatment Technique (SWTR and GWR) · code 41 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
| 1993-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 5 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.
Morro Bay Pw Dept - Water Division: frequently asked questions
Who runs Morro Bay Pw Dept - Water Division?
Morro Bay Pw Dept - Water Division (PWSID CA4010011) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Morro Bay Pw Dept - Water Division serve?
Morro Bay Pw Dept - Water Division reports serving 13,757 people through 5,612 service connections in San Luis Obispo County, California.
Where does Morro Bay Pw Dept - Water Division 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 Morro Bay Pw Dept - Water Division have any drinking water violations?
EPA's records list 5 violations for this system; all are health-based, and the most recent began in November 2006. 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 Morro Bay Pw Dept - Water Division'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 5 violations for this system; all are health-based, and the most recent began in November 2006. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Morro Bay Pw Dept - Water Division's water quality report?
As a community water system, Morro Bay Pw Dept - Water Division 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 |
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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, “Morro Bay Pw Dept - Water Division, PWSID CA4010011, California”, https://aquacensus.com/water-systems/california/morro-bay-pw-dept-water-division-ca4010011 (data as of October 1, 2026).