CITY OF ARROYO GRANDE UTILITIES DIVISION
California — Community Water System — PWSID: CA4010001
System Information
| PWSID | CA4010001 |
| System Name | CITY OF ARROYO GRANDE UTILITIES DIVISION |
| 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 | Nov 17, 2025 |
Location & Contact
| State | California |
| City | ARROYO GRANDE |
| ZIP Code | 93420 |
| Address | 300 EAST BRANCH STREET |
| Organization | TAYLOR, SHANE |
| Phone | 805-473-5464 |
Population & Service
| Population Served | 17,963 |
| Service Connections | 6,854 |
Drinking Water Violations (5)
This water system has 5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| May 1, 2025 | Jun 30, 2025 | Revised Total Coliform Rule | MON | No | No | — | — | — | Archived | Jun 30, 2025 | Revised Total Coliform Rule |
| Jan 1, 2012 | Dec 31, 2012 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2012 | Nitrate Rule |
| Jan 1, 2012 | Dec 31, 2012 | Nitrate | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2012 | Nitrate Rule |
| Aug 1, 1996 | Aug 31, 1996 | TTHM | MCL | Yes | No | .109 MG/L | 0.080 mg/L | .1 | Resolved | Aug 31, 1996 | Former Total Trihalomethane Rule |
| Aug 1, 1996 | Aug 31, 1996 | TTHM | MCL | Yes | No | .109 MG/L | 0.080 mg/L | .1 | Resolved | Aug 31, 1996 | Former Total Trihalomethane Rule |
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.