GRESHAM, CITY OF
Oregon — Community Water System — PWSID: OR4100357
System Information
| PWSID | OR4100357 |
| System Name | GRESHAM, CITY OF |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Dec 23, 2025 |
Location & Contact
| State | Oregon |
| City | GRESHAM |
| ZIP Code | 97030 |
| Address | 1333 NW EASTMAN PKWY |
| Organization | GRESHAM, CITY OF |
| Phone | 503-618-2314 |
Population & Service
| Population Served | 73,932 |
| Service Connections | 17,513 |
Drinking Water Violations (24)
This water system has 24 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 | Sep 30, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2022 | Sep 30, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2007 | Sep 30, 2007 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Sep 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2007 | Sep 30, 2007 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Sep 30, 2007 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Feb 1, 2006 | Feb 28, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2006 | Total Coliform Rule |
| Sep 1, 2002 | Sep 30, 2002 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Sep 30, 2002 | Total Coliform Rule |
| Jun 1, 2000 | Jun 30, 2000 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2000 | Total Coliform Rule |
| Mar 1, 2000 | Mar 31, 2000 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 2000 | Total Coliform Rule |
| Feb 1, 2000 | Feb 29, 2000 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 29, 2000 | Total Coliform Rule |
| Nov 1, 1995 | Nov 30, 1995 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1995 | Total Coliform Rule |
| Jun 1, 1995 | Jun 30, 1995 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1995 | Total Coliform Rule |
| Jan 1, 1995 | Jan 31, 1995 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jan 31, 1995 | Total Coliform Rule |
| Nov 1, 1994 | Nov 30, 1994 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 1994 | Total Coliform Rule |
| Jun 1, 1993 | Jun 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 1993 | Total Coliform Rule |
| May 1, 1993 | May 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | May 31, 1993 | Total Coliform Rule |
| Apr 1, 1993 | Apr 30, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Apr 30, 1993 | Total Coliform Rule |
| Mar 1, 1993 | Mar 31, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Mar 31, 1993 | Total Coliform Rule |
| Feb 1, 1993 | Feb 28, 1993 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 1993 | Total Coliform Rule |
| Dec 1, 1992 | Dec 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 1992 | Total Coliform Rule |
| Aug 1, 1992 | Aug 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Aug 31, 1992 | Total Coliform Rule |
| Jul 1, 1992 | Jul 31, 1992 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jul 31, 1992 | Total Coliform Rule |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | 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.