HOLLISTER, CA · San Benito County

HARMONY HILLS WATER SYSTEM Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of September 7, 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 San Benito 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): CA3500503
System type: Community Water System
Population served: 10
Service connections: 8
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

HARMONY HILLS WATER SYSTEM is one of 3,951 community water systems in California in the 500 or fewer people size category, formerly serving 10 people from surface water.

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 8 entries between 1980 and 2008, all of which EPA lists as closed. Nothing has been added since 2008.

Of the 8, 4 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, the Radionuclides and Revised Rad Rule, and inorganic chemicals.

Violation history

Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
August 1, 2008 – August 31, 2008
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
June 1, 2008 – June 30, 2008
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
August 1, 1992 – August 31, 1992
Archived
Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
July 1, 1992 – July 31, 1992
Archived
Monitoring, Regular
—
Antimony, Total
January 1, 1992 – December 31, 1992
Resolved
Notification, Public
—
No contaminant on record
November 1, 1982 – November 30, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
October 30, 1980 – October 29, 1981
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
August 1, 2008 – August 31, 2008	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
June 1, 2008 – June 30, 2008	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
August 1, 1992 – August 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
July 1, 1992 – July 31, 1992	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Archived
January 1, 1992 – December 31, 1992	Monitoring, Regular	Antimony, Total	—	Resolved
November 1, 1982 – November 30, 1982	Notification, Public	—	—	Archived
October 1, 1981 – September 30, 1982	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived
October 30, 1980 – October 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Archived closed in EPA's records (typically due to age or a data correction)Resolved addressed and confirmed by the state

Enforcement actions

October 14, 2008State Boil Water Order6 linked violations
December 5, 2007State Violation/Reminder Notice1 linked violation
September 18, 2007State Compliance achieved2 linked violations
June 18, 2007State Violation/Reminder Notice4 linked violations
June 13, 2007State Compliance achieved4 linked violations
June 16, 2006State Violation/Reminder Notice1 linked violation
September 30, 2005Federal Compliance achieved1 linked violation
July 8, 2005State Boil Water Order1 linked violation
June 27, 2005State Compliance achieved1 linked violation
January 18, 2005State Compliance achieved2 linked violations
July 21, 2004State Compliance achieved2 linked violations
February 6, 2002State Compliance achieved2 linked violations

Last known contact on file (system is inactive)

HARMONY HILLS WATER SYSTEM

8316378218

HOLLISTER, CA 95024