JAMESTOWN, CA · San Diego County
MCCAIN VALLEY CC #21 Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of April 26, 2021. 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 San Diego 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)
- CA3710801
- System type
- Community Water System
- Population served
- 130
- Service connections
- 4
- Ownership
- state government
- Water source
- groundwater (wells)
MCCAIN VALLEY CC #21 is one of 3,951 community water systems in California in the 500 or fewer people size category, formerly serving 130 people from groundwater.
EPA's federal records list this system as inactive in 2021; the record below is historical.
As of August 1, 2026, its federal record holds 7 entries between 1991 and 2011, all of which EPA lists as closed. Nothing has been added since 2011.
All 7 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 Total Coliform Rules and the Stage 1 Disinfectants and Disinfection Byproducts Rule.
Violation history
Monitoring, Routine Major (TCR)
—Coliform (TCR)
February 1, 2011 – February 28, 2011
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
January 1, 2011 – January 31, 2011
ResolvedMonitoring and Reporting (DBP)
—Chlorine
January 1, 2011 – March 31, 2011
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
July 1, 2010 – July 31, 2010
ResolvedMonitoring and Reporting (DBP)
—Chlorine
January 1, 2008 – March 31, 2008
ResolvedMonitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
October 1, 2007 – September 30, 2010
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
May 1, 1991 – May 31, 1991
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| February 1, 2011 – February 28, 2011 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2011 – January 31, 2011 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2011 – March 31, 2011 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| July 1, 2010 – July 31, 2010 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
| January 1, 2008 – March 31, 2008 | Monitoring and Reporting (DBP) | Chlorine | — | Resolved |
| October 1, 2007 – September 30, 2010 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| May 1, 1991 – May 31, 1991 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- January 31, 2013State Compliance achieved6 linked violations
- April 26, 2011State Administrative/Compliance Order without penalty issued24 linked violations
- November 20, 1995State Formal Notice of Violation issued19 linked violations
Last known contact on file (system is inactive)
BORLA, JOE
209-984-5291
JAMESTOWN, CA 95327