WOLSBORN FARMS WATER DISTRICT
Oregon - Community Water System - PWSID: OR4100381
System Information
| PWSID | OR4100381 |
| System Name | WOLSBORN FARMS WATER DISTRICT |
| 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 | Mar 12, 1979 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Oregon |
| City | HILLSBORO |
| ZIP Code | 97123 |
| Address | 25610 SW WOLSBORN AVE |
| Organization | WOLSBORN FARMS WATER DISTRICT |
| Phone | 530-238-7373 |
Population & Service
| Population Served | 90 |
| Service Connections | 32 |
Drinking Water Violations (87)
This water system has 87 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 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Oct 1, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Unaddressed | - | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Archived | Dec 31, 2025 | - | |
| Aug 1, 2022 | Aug 31, 2022 | MR | No | Yes | - | - | - | Resolved | Aug 31, 2022 | - | |
| Jul 1, 2022 | Jul 31, 2022 | MR | No | Yes | - | - | - | Resolved | Jul 31, 2022 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2018 | Dec 31, 2018 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2018 | - | |
| Jan 1, 2017 | Jan 31, 2017 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2017 | - | |
| Dec 1, 2016 | Dec 31, 2016 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2016 | - | |
| Nov 1, 2016 | Nov 30, 2016 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2016 | - | |
| Oct 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Oct 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Aug 1, 2016 | Aug 31, 2016 | MON | No | Yes | - | - | - | Resolved | Aug 31, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Sep 30, 2016 | - | |
| Jun 1, 2016 | Jun 30, 2016 | MON | No | Yes | - | - | - | Archived | Jun 30, 2016 | - | |
| May 1, 2016 | May 31, 2016 | MON | No | Yes | - | - | - | Archived | May 31, 2016 | - | |
| Apr 1, 2016 | Apr 30, 2016 | MON | No | Yes | - | - | - | Archived | Apr 30, 2016 | - | |
| Mar 1, 2016 | Mar 31, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Mar 31, 2016 | - | |
| Feb 1, 2016 | Feb 29, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Feb 29, 2016 | - | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Mar 31, 2016 | - | |
| Jan 1, 2016 | Mar 31, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2016 | - | |
| Jan 1, 2016 | Jan 31, 2016 | MR | No | No | - | 5% of samples | - | Resolved | Jan 31, 2016 | - | |
| Jan 1, 2016 | Dec 31, 2016 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Dec 1, 2015 | Dec 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Dec 31, 2015 | - | |
| Nov 1, 2015 | Nov 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Nov 30, 2015 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Oct 1, 2015 | Oct 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Oct 31, 2015 | - | |
| Oct 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | 10 mg/L | - | Resolved | Dec 31, 2015 | - | |
| Sep 1, 2015 | Sep 30, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Sep 30, 2015 | - | |
| Aug 1, 2015 | Aug 31, 2015 | MR | No | No | - | 5% of samples | - | Resolved | Aug 31, 2015 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 10 mg/L | - | Resolved | Mar 31, 2015 | - | |
| Jan 1, 2015 | Mar 31, 2015 | MR | No | Yes | - | 0.7 mg/L | - | Resolved | Mar 31, 2015 | - | |
| Jan 1, 2015 | Dec 31, 2015 | MR | No | Yes | - | - | - | Resolved | Dec 31, 2015 | - | |
| Jan 1, 2014 | Sep 30, 2016 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Sep 30, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.006 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.2 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.4 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.002 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.007 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.05 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.004 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.003 mg/L | - | Resolved | Dec 31, 2016 | - | |
| Jan 1, 2014 | Dec 31, 2016 | MR | No | Yes | - | 0.0002 mg/L | - | Resolved | Dec 31, 2016 | - |
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.