CHINO HILLS, CITY OF
California — Community Water System — PWSID: CA3610036
System Information
| PWSID | CA3610036 |
| System Name | CHINO HILLS, CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 22, 1979 |
| Last Reported | Mar 20, 2026 |
Location & Contact
| State | California |
| City | CHINO HILLS |
| ZIP Code | 91709 |
| Address | 14000 City Center Drive |
| Organization | WILEY, MARK |
| Phone | 909-364-2854 |
Population & Service
| Population Served | 76,414 |
| Service Connections | 21,799 |
Drinking Water Violations (43)
This water system has 43 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 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Jul 1, 1994 | Jul 31, 1994 | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1994 | — | |
| Sep 1, 1984 | Sep 30, 1984 | MCL | Yes | No | — | 10 mg/L | — | Archived | Sep 30, 1984 | — | |
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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.