CITY OF RIO VISTA
California — Community Water System — PWSID: CA4810004
System Information
| PWSID | CA4810004 |
| System Name | CITY OF RIO VISTA |
| System Type | Community Water System |
| Water Source | Ground Water |
| 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 | RIO VISTA |
| ZIP Code | 94571-1842 |
| Address | 1 MAIN ST |
| Organization | MALCOLM, GREG |
| Phone | 707-374-6451 |
Population & Service
| Population Served | 10,489 |
| Service Connections | 5,646 |
Drinking Water Violations (11)
This water system has 11 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, 2000 | Jul 31, 2000 | Benzene | MR | No | No | — | 0.005 mg/L | — | Resolved | Jul 31, 2000 | Volatile Organic Chemicals |
| Jul 1, 2000 | Jul 31, 2000 | Benzene | MR | No | No | — | 0.005 mg/L | — | Resolved | Jul 31, 2000 | Volatile Organic Chemicals |
| Jan 1, 1995 | Jan 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jan 31, 1995 | Total Coliform Rule |
| Jan 1, 1995 | Jan 31, 1995 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jan 31, 1995 | Total Coliform Rule |
| Oct 1, 1994 | Oct 31, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1994 | Total Coliform Rule |
| Oct 1, 1994 | Oct 31, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Oct 31, 1994 | Total Coliform Rule |
| Jun 1, 1994 | Jun 30, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1994 | Total Coliform Rule |
| Jun 1, 1994 | Jun 30, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1994 | Total Coliform Rule |
| Jun 1, 1994 | Jun 30, 1994 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 1994 | Total Coliform Rule |
| Jul 29, 1990 | Mar 13, 1993 | Arsenic | MR | No | No | — | 0.010 mg/L | — | Resolved | Mar 13, 1993 | Arsenic Rule |
| Jul 29, 1990 | Mar 13, 1993 | Arsenic | MR | No | No | — | 0.010 mg/L | — | Resolved | Mar 13, 1993 | Arsenic 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.