EL MONTE, CA

RICHWOOD MUTUAL WATER CO. Water System

Inactive system

This water system is marked inactive in EPA’s federal records as of June 9, 2009. 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 CA.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 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): CA1910037
System type: Community Water System
Population served: 0
Service connections: 204
Ownership: privately owned
Water source: groundwater (wells)

Violation history

Maximum Contaminant Level Violation, Monthly (TCR)
Health-based
Coliform (TCR)
January 1, 1998 – January 31, 1998
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
April 1, 1992 – April 30, 1992
Resolved
Monitoring, Repeat Major (TCR)
—
Coliform (TCR)
March 1, 1991 – February 28, 1992
Archived
Notification, Public
—
No contaminant on record
December 1, 1989 – December 31, 1989
Archived
Notification, Public
—
No contaminant on record
September 1, 1989 – September 30, 1989
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
March 1, 1988 – February 28, 1989
Resolved

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

Period	Violation	Contaminant / rule	Health-based	Status
January 1, 1998 – January 31, 1998	Maximum Contaminant Level Violation, Monthly (TCR)	Coliform (TCR)	Health-based	Resolved
April 1, 1992 – April 30, 1992	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved
March 1, 1991 – February 28, 1992	Monitoring, Repeat Major (TCR)	Coliform (TCR)	—	Archived
December 1, 1989 – December 31, 1989	Notification, Public	—	—	Archived
September 1, 1989 – September 30, 1989	Notification, Public	—	—	Archived
March 1, 1988 – February 28, 1989	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Resolved

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

Enforcement actions

April 20, 1998State Compliance achieved2 linked violations
December 11, 1996State Formal Notice of Violation issued1 linked violation
December 11, 1996State Compliance achieved1 linked violation
September 12, 1996State Compliance achieved1 linked violation
September 12, 1996State Administrative Penalty assessed1 linked violation
March 27, 1996State Administrative Penalty assessed1 linked violation
March 27, 1996State Compliance achieved1 linked violation
July 5, 1995State Compliance achieved1 linked violation
July 5, 1995State Administrative Penalty assessed1 linked violation
May 10, 1995State Compliance achieved1 linked violation
May 10, 1995State Formal Notice of Violation issued1 linked violation
May 5, 1995State Compliance achieved2 linked violations
May 5, 1995State Administrative/Compliance Order without penalty issued2 linked violations
April 26, 1995State Formal Notice of Violation issued1 linked violation
April 26, 1995State Compliance achieved1 linked violation
March 24, 1995State Compliance achieved4 linked violations
March 24, 1995State Formal Notice of Violation issued4 linked violations
January 5, 1995State Compliance achieved1 linked violation
January 5, 1995State Formal Notice of Violation issued1 linked violation
May 18, 1992State Compliance achieved1 linked violation
June 4, 1990State Administrative/Compliance Order without penalty issued4 linked violations
June 4, 1990State Compliance achieved1 linked violation

Last known contact on file (system is inactive)

Not on record

Phone not on record

EL MONTE, CA 91732