Oxnard, CA · Ventura County
RIO SCHOOL DIST/ EL RIO SCHOOL Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of August 24, 2011. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Ventura County, CA.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA5602402
- System type
- Community Water System
- Population served
- 9
- Service connections
- 3
- Ownership
- local government
- Water source
- groundwater (wells)
RIO SCHOOL DIST/ EL RIO SCHOOL is one of 3,951 community water systems in California in the 500 or fewer people size category, formerly serving 9 people from groundwater.
EPA's federal records list this system as inactive in 2011; the record below is historical.
As of August 1, 2026, its federal record holds 7 entries between 1980 and 2007, all of which EPA lists as closed. Nothing has been added since 2007.
Of the 7, 3 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Stage 1 Disinfectants and Disinfection Byproducts Rule, the Total Coliform Rules, and the Miscellaneous Other Rules.
Violation history
Monitoring and Reporting (DBP)
—TTHM
October 1, 2007 – September 30, 2008
ArchivedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
October 1, 2007 – September 30, 2008
ArchivedMonitoring, Routine Major (TCR)
—Coliform (TCR)
April 1, 2004 – April 30, 2004
ResolvedConsumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2003 – July 1, 2006
ResolvedMaximum Contaminant Level Violation, Monthly (TCR)
Health-basedColiform (TCR)
December 1, 1997 – December 31, 1997
ResolvedNotification, Public
—No contaminant on record
August 1, 1984 – August 31, 1984
ArchivedNotification, Public
—No contaminant on record
April 30, 1980 – May 29, 1980
Archived
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2007 – September 30, 2008 | Monitoring and Reporting (DBP) | TTHM | — | Archived |
| October 1, 2007 – September 30, 2008 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Archived |
| April 1, 2004 – April 30, 2004 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| July 1, 2003 – July 1, 2006 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| December 1, 1997 – December 31, 1997 | Maximum Contaminant Level Violation, Monthly (TCR) | Coliform (TCR) | Health-based | Resolved |
| August 1, 1984 – August 31, 1984 | Notification, Public | — | — | Archived |
| April 30, 1980 – May 29, 1980 | Notification, Public | — | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state
Enforcement actions
- September 24, 2008State Administrative/Compliance Order without penalty issued2 linked violations
- July 1, 2006State Compliance achieved5 linked violations
- May 15, 2004State Administrative/Compliance Order without penalty issued1 linked violation
- August 13, 2003State Violation/Reminder Notice1 linked violation
- March 27, 2003State Administrative/Compliance Order without penalty issued12 linked violations
Last known contact on file (system is inactive)
Rio School Dist/ El Rio School
8054853111
Oxnard, CA 93036