MONTESANO CITY OF
Washington — Community Water System — PWSID: WA5356000
System Information
| PWSID | WA5356000 |
| System Name | MONTESANO CITY OF |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | Yes |
| First Reported | Feb 7, 1981 |
| Last Reported | Mar 26, 2026 |
Location & Contact
| State | Washington |
| City | Montesano |
| ZIP Code | 98563 |
| Address | 112 North Main Street |
| Organization | MONTESANO CITY OF |
| Phone | — |
Population & Service
| Population Served | 6,204 |
| Service Connections | 2,257 |
Drinking Water Violations (25)
This water system has 25 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, 2022 | — | Other | No | No | — | — | — | Resolved | Dec 28, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jan 1, 2022 | Dec 31, 2022 | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | — | |
| Jul 1, 2012 | — | Other | No | No | — | — | — | Resolved | Oct 19, 2012 | — | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Oct 1, 2007 | Dec 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Dec 31, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | — | |
| Jul 1, 2007 | Sep 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Sep 30, 2007 | — | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | — | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | — | |
| Apr 1, 2007 | Jun 30, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Jun 30, 2007 | — | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Mar 31, 2007 | — | |
| Jan 1, 2007 | Mar 31, 2007 | MR | No | Yes | — | 0.02 mg/L | — | Resolved | Mar 31, 2007 | — | |
| Nov 1, 2006 | Nov 30, 2006 | MCL | Yes | No | — | 5% of samples | — | Archived | Nov 30, 2006 | — | |
| Apr 1, 2004 | Apr 30, 2004 | MCL | Yes | No | — | 5% of samples | — | Archived | Apr 30, 2004 | — | |
| Jun 1, 1994 | Jun 30, 1994 | MCL | Yes | No | — | 5% of samples | — | Archived | Jun 30, 1994 | — | |
| Oct 1, 1992 | Oct 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Oct 31, 1992 | — | |
| Aug 1, 1992 | Aug 31, 1992 | MR | No | No | — | 5% of samples | — | Archived | Aug 31, 1992 | — | |
| Dec 1, 1991 | Dec 31, 1991 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1991 | — | |
| Oct 1, 1979 | Oct 31, 1979 | MR | No | No | — | 15 pCi/L | — | Archived | Oct 31, 1979 | — |
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.