HILLSBORO, CITY OF
Oregon — Community Water System — PWSID: OR4101513
System Information
| PWSID | OR4101513 |
| System Name | HILLSBORO, 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 | Sep 3, 2008 |
| Last Reported | Dec 23, 2025 |
Location & Contact
| State | Oregon |
| City | HILLSBORO |
| ZIP Code | 97123 |
| Address | 150 E MAIN ST |
| Organization | HILLSBORO, CITY OF |
| Phone | 503-615-6579 |
Population & Service
| Population Served | 92,632 |
| Service Connections | 28,385 |
Drinking Water Violations (3)
This water system has 3 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 | — | Consumer Confidence Rule | Other | No | No | — | — | — | Resolved | Jul 8, 2025 | Consumer Confidence Rule |
| Jun 1, 2016 | Jun 30, 2016 | Revised Total Coliform Rule | MON | No | No | — | — | — | Resolved | Jun 30, 2016 | Revised Total Coliform Rule |
| Jul 1, 2009 | Jul 31, 2009 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Jul 31, 2009 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
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.