Public water system · CA3710034
ActiveOtay Water District
At a glance
Otay Water District (PWSID CA3710034) is an active community water system in San Diego County, California. It reports serving 238,008 people through 50,807 service connections. Its primary water source is purchased surface water, 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
238,008
Service connections
50,807
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Otay Water District compare with other water systems in San Diego County?
By EPA's size categories, Otay Water District is a very large system (more than 100,000 people). San Diego County has 191 active public water systems, and Otay Water District is the 3rd-largest of them by population served. Its population served is about 12 times the county average of 19,427 people per system, and accounts for 6.4% 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 Otay Water District is about 36 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 Otay Water District?
EPA lists Otay Water 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. 58 of the 191 active systems in San Diego County (30%) are also owned by a local government.
Does Otay Water District 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 Otay Water District. For the latest compliance status, check EPA ECHO for current compliance history.
Otay Water District: frequently asked questions
Who runs Otay Water District?
Otay Water District (PWSID CA3710034) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Otay Water District serve?
Otay Water District reports serving 238,008 people through 50,807 service connections in San Diego County, California.
Where does Otay Water District 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 Otay Water District have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Otay Water 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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Otay Water District's water quality report?
As a community water system, Otay Water 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 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 |
| 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 |
| Vista Irrigation District | San Diego | 132,430 | 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, “Otay Water District, PWSID CA3710034, California”, https://aquacensus.com/water-systems/california/otay-water-district-ca3710034 (data as of October 1, 2026).