RIALTO, CA · San Bernardino County

WEST VALLEY WATER DISTRICT Water System

Current status

No open violations on record as of July 4, 2026.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

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): CA3610004
System type: Community Water System
Population served: 104,498
Service connections: 23,436
Ownership: local government
Water source: surface water (rivers, lakes, or reservoirs)

Violation history

Monitoring, Regular
—
Nitrate
January 1, 2012 – December 31, 2012
Resolved
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
June 1, 1987 – June 30, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
May 1, 1987 – May 31, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
April 1, 1987 – April 30, 1987
Archived
Maximum Contaminant Level Violation, Single Sample
Health-based
Nitrate
March 1, 1987 – March 31, 1987
Archived

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, 2012 – December 31, 2012	Monitoring, Regular	Nitrate	—	Resolved
June 1, 1987 – June 30, 1987	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
May 1, 1987 – May 31, 1987	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
April 1, 1987 – April 30, 1987	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived
March 1, 1987 – March 31, 1987	Maximum Contaminant Level Violation, Single Sample	Nitrate	Health-based	Archived

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

Enforcement actions

January 29, 2014State Formal Notice of Violation issued4 linked violations
December 4, 2012State Violation/Reminder Notice1 linked violation

Contact

THIEL, JOHN

909-875-3706

RIALTO, CA 92377