KELSO WATER ASSN
Oregon - Community Water System - PWSID: OR4100134
System Information
| PWSID | OR4100134 |
| System Name | KELSO WATER ASSN |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 10 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 12, 1979 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Oregon |
| City | SANDY |
| ZIP Code | 97055 |
| Address | PO BOX 1981 |
| Organization | KELSO WATER ASSN |
| Phone | 503-806-4734 |
Population & Service
| Population Served | 300 |
| Service Connections | 102 |
Drinking Water Violations (88)
This water system has 88 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, 2025 | - | Other | No | No | - | - | - | Resolved | Jul 29, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | - | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | - | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 10 mg/L | - | Archived | Dec 31, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Jun 25, 2025 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Sep 26, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.2 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.07 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.002 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.1 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 10 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 1 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.075 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.07 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.6 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.007 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.7 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.005 mg/L | - | Archived | Dec 31, 2025 | - | |
| Oct 1, 2020 | Oct 31, 2020 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2020 | - | |
| Mar 1, 2020 | Mar 31, 2020 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2020 | - | |
| Sep 1, 2017 | Sep 30, 2017 | MON | No | Yes | - | - | - | Resolved | Sep 30, 2017 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 15 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 30 ug/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 5 pCi/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2017 | Dec 31, 2025 | MR | No | Yes | - | 0.010 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Sep 30, 2016 | - | |
| Jan 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2016 | - | |
| Dec 1, 2014 | Dec 31, 2014 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2014 | - | |
| Jul 1, 2009 | Jul 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2009 | - | |
| Jul 1, 2009 | Jul 31, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Jul 31, 2009 | - | |
| Apr 1, 2009 | Apr 30, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2009 | - | |
| Apr 1, 2009 | Apr 30, 2009 | MR | No | No | - | 5% of samples | - | Resolved | Apr 30, 2009 | - | |
| Dec 1, 2007 | Dec 31, 2007 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2007 | - | |
| Jul 1, 2003 | Jul 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2003 | - | |
| Jul 1, 2003 | Jul 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Jul 31, 2003 | - | |
| Oct 19, 2002 | - | Other | No | No | - | - | - | Resolved | Mar 26, 2003 | - | |
| Jan 1, 2002 | Dec 31, 2004 | MR | No | Yes | - | 0.010 mg/L | - | Resolved | Dec 31, 2004 | - | |
| Dec 1, 2000 | Dec 31, 2000 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2000 | - | |
| Dec 1, 2000 | Dec 31, 2000 | MCL | Yes | No | - | 5% of samples | - | Resolved | Dec 31, 2000 | - |
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.