Public water system record
City of Wilsonville
Serves Wilsonville, Clackamas County, OR · 25,915 people served
Federal records show no health-based violations and 6 monitoring/reporting issues for City of Wilsonville 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
- 6
Key facts
- City of Wilsonville draws water from 1 surface water intake.
- Most recent formal enforcement: compliance order with a penalty by Oregon, March 1995.
- Record on file since 1976, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 7,310 service lines.
Check whether City of Wilsonville 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 |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2018 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2017 | Resolved |
Full record since 1976
EPA's records for City of Wilsonville go back to 1976. Before October 19, 2016 they list 6 health-based violations (6 resolved) and 15 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 2 |
| 1990s | 6 | 0 |
| 2000s | 0 | 5 |
| 2010 to October 18, 2016 | 0 | 8 |
| October 19, 2016 to 2019 | 0 | 5 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 1995, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Mar 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 1993 | Resolved |
Enforcement actions
Oregon regulators took 1 formal enforcement action against City of Wilsonville in 1995. The most recent was a compliance order with a penalty in March 1995.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 27, 1995 | Oregon | Compliance order with a penalty | 1 violation (1 health-based): Total Coliform |
Where the water comes from
City of Wilsonville draws water from 1 surface water intake. 1 other community water system buys water from City of Wilsonville.
Community systems that buy water from it
- City of Sherwood Sherwood, OR
Annual water quality report
City of Wilsonville 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