Public water system · CA3710027
ActiveVista Irrigation District
At a glance
Vista Irrigation District (PWSID CA3710027) is an active community water system in San Diego County, California. It reports serving 132,430 people through 27,798 service connections. Its primary water source is surface water, 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 December 1988.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
132,430
Service connections
27,798
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Vista Irrigation District compare with other water systems in San Diego County?
By EPA's size categories, Vista Irrigation District is a very large system (more than 100,000 people). San Diego County has 191 active public water systems. Its population served is about 6.8 times the county average of 19,427 people per system, and accounts for 3.6% 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 Vista Irrigation District is about 20 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 609 California systems (8.1%) list surface water as their primary source.
Who owns and regulates Vista Irrigation District?
EPA lists Vista Irrigation 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 Vista Irrigation 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 December 1988. By type: 1 public notice, recordkeeping or other. EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1988-12-01 | Public notice, recordkeeping or otherNotification, Public · code 06 | Not reported | No | Archived |
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.
Vista Irrigation District: frequently asked questions
Who runs Vista Irrigation District?
Vista Irrigation District (PWSID CA3710027) is a community water system owned by a local government. It is regulated by the CA state drinking water program.
How many people does Vista Irrigation District serve?
Vista Irrigation District reports serving 132,430 people through 27,798 service connections in San Diego County, California.
Where does Vista Irrigation District get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Vista Irrigation 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 December 1988. 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 Vista Irrigation 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 December 1988. For current results, consult the system's annual water quality report, EPA ECHO, or the CA state drinking water program.
Where can I find Vista Irrigation District's water quality report?
As a community water system, Vista Irrigation 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 |
| 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, “Vista Irrigation District, PWSID CA3710027, California”, https://aquacensus.com/water-systems/california/vista-irrigation-district-ca3710027 (data as of October 1, 2026).