Public water system record
City of Hillsboro
Serves Hillsboro, Washington County, OR · 92,632 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for City of Hillsboro in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- City of Hillsboro buys its water from Joint Water Commission.
- Record on file since 2009, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 28,351 service lines.
Check whether City of Hillsboro serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
Full record since 2009
EPA's records for City of Hillsboro go back to 2009. Before October 19, 2016 they list no health-based violations and 4 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 0 | 2 |
| 2010 to October 18, 2016 | 0 | 2 |
| 2020s | 0 | 1 |
Where the water comes from
City of Hillsboro buys its water from Joint Water Commission. It lists no wells or intakes of its own. 1 other community water system buys water from City of Hillsboro.
Buys water from
- Joint Water Commission Hillsboro, OR
Community systems that buy water from it
- City of Cornelius Cornelius, OR
Annual water quality report
City of Hillsboro must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Oregon.
Certified drinking water labs by state EPA guidance for private wells