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CHINO HILLS, CITY OF

California — Community Water System — PWSID: CA3610036

System Information

PWSIDCA3610036
System NameCHINO HILLS, CITY OF
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedMar 22, 1979
Last ReportedNov 17, 2025

Location & Contact

StateCalifornia
CityCHINO HILLS
ZIP Code91709
Address14000 City Center Drive
OrganizationWILEY, MARK
Phone909-364-2854

Population & Service

Population Served76,414
Service Connections21,799

Drinking Water Violations (14)

This water system has 14 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Jul 1, 1994 Jul 31, 1994 Coliform (TCR) MR No No — 5% of samples — Resolved Jul 31, 1994 Total Coliform Rule
Sep 1, 1984 Sep 30, 1984 Nitrate MCL Yes No — 10 mg/L — Archived Sep 30, 1984 Nitrate Rule
— — — No No — — — — — —
— — — No No — — — — — —

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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