WALLOWA LAKE CO SERVICE DIST
Oregon - Community Water System - PWSID: OR4101420
System Information
| PWSID | OR4101420 |
| System Name | WALLOWA LAKE CO SERVICE DIST |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Aug 29, 1989 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Oregon |
| City | ENTERPRISE |
| ZIP Code | 97828 |
| Address | 101 S RIVER ST RM 302 |
| Organization | WALLOWA LAKE CO SERVICE DIST |
| Phone | 541-263-1533 |
Population & Service
| Population Served | 350 |
| Service Connections | 288 |
Drinking Water Violations (126)
This water system has 126 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 1, 2025 | Oct 31, 2025 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2025 | - | |
| Sep 1, 2025 | Sep 30, 2025 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2025 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Jul 1, 2024 | Jul 31, 2024 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2024 | - | |
| Apr 1, 2024 | Apr 30, 2024 | MON | No | Yes | - | - | - | Resolved | Apr 30, 2024 | - | |
| Dec 1, 2023 | Dec 31, 2023 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2023 | - | |
| Oct 1, 2023 | - | MR | No | No | - | TT | - | Resolved | Sep 11, 2024 | - | |
| Aug 1, 2023 | Aug 31, 2023 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Oct 1, 2019 | - | MR | No | No | - | TT | - | Resolved | Aug 7, 2020 | - | |
| Jan 1, 2018 | Mar 31, 2018 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2018 | - | |
| Oct 1, 2017 | Dec 31, 2017 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Dec 31, 2017 | - | |
| Apr 1, 2017 | Jun 30, 2017 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Jun 30, 2017 | - | |
| Feb 4, 2017 | - | MR | No | Yes | - | - | - | Resolved | Feb 6, 2017 | - | |
| Jan 1, 2017 | - | MR | No | No | - | TT | - | Resolved | Oct 27, 2016 | - | |
| Jan 1, 2017 | Mar 31, 2017 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 5 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 30 ug/L | - | Resolved | Sep 30, 2016 | - | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2016 | - | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Mar 31, 2016 | - | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | - | 30 ug/L | - | Resolved | Mar 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2019 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 2019 | - | |
| Oct 17, 2013 | - | MR | No | Yes | - | - | - | Resolved | Dec 9, 2013 | - | |
| Sep 1, 2011 | Sep 30, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Sep 1, 2011 | Sep 30, 2011 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2011 | - | |
| Mar 1, 2009 | Mar 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2009 | - | |
| Jan 1, 2008 | Dec 31, 2016 | MR | No | Yes | - | 30 ug/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2008 | Dec 31, 2016 | MR | No | Yes | - | 5 pCi/L | - | Archived | Dec 31, 2016 | - | |
| Jul 1, 2007 | Jul 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2007 | - | |
| Nov 1, 2006 | Nov 30, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2006 | - | |
| Aug 1, 2006 | Aug 31, 2006 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2006 | - | |
| Jan 1, 2004 | - | MR | No | No | - | TT | - | Resolved | Apr 20, 2005 | - | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2003 | - | |
| Jan 1, 2003 | Dec 31, 2003 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2003 | - | |
| Oct 1, 2002 | Oct 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2002 | - | |
| Sep 1, 2002 | Sep 30, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2002 | - | |
| Jul 1, 2002 | Jul 31, 2002 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.07 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 1 mg/L | - | Resolved | Jun 4, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2002 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2002 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.6 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.005 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2004 | - |
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.