Public water system · CA3710037
ActivePadre Dam Mwd
At a glance
Padre Dam Mwd (PWSID CA3710037) is an active community water system in San Diego County, California. It reports serving 93,980 people through 23,354 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in March 1995.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
93,980
Service connections
23,354
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Padre Dam Mwd compare with other water systems in San Diego County?
By EPA's size categories, Padre Dam Mwd is a large system (10,001 to 100,000 people). San Diego County has 191 active public water systems. Its population served is about 4.8 times the county average of 19,427 people per system, and accounts for 2.5% of the 3,710,459 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 Padre Dam Mwd is about 14 times 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 Padre Dam Mwd?
EPA lists Padre Dam Mwd 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. 58 of the 191 active systems in San Diego County (30%) are also owned by a local government.
Does Padre Dam Mwd have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in March 1995. By type: 1 contaminant level above the legal limit. 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 |
|---|---|---|---|---|
| 1995-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | 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.
Padre Dam Mwd: frequently asked questions
Who runs Padre Dam Mwd?
Padre Dam Mwd (PWSID CA3710037) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Padre Dam Mwd serve?
Padre Dam Mwd reports serving 93,980 people through 23,354 service connections in San Diego County, California.
Where does Padre Dam Mwd 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 Padre Dam Mwd have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in March 1995. 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 Padre Dam Mwd'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 March 1995. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Padre Dam Mwd's water quality report?
As a community water system, Padre Dam Mwd 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 Diego County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| San Diego, City of | San Diego | 1,385,379 | Community | Surface water |
| Helix Water District | San Diego | 277,668 | Community | Surface water |
| Otay Water District | San Diego | 238,008 | Community | Purchased surface water |
| Sweetwater Authority | San Diego | 191,282 | Community | Surface water |
| Oceanside, City of | San Diego | 171,483 | Community | Purchased surface water |
| Escondido, City of | San Diego | 137,044 | 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, “Padre Dam Mwd, PWSID CA3710037, California”, https://aquacensus.com/water-systems/california/padre-dam-mwd-ca3710037 (data as of October 1, 2026).