Public water system record
City of Gaston
Serves Gaston, Washington County, OR · 625 people served
Federal records show no health-based violations and 11 monitoring/reporting issues for City of Gaston 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
- 11
Key facts
- City of Gaston buys its water from Hillsboro-Cherry Grove and Joint Water Commission.
- Record on file since 1993, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 2 unknown out of 334 service lines.
Check whether City of Gaston 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 |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Oct 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2014 | Resolved |
Full record since 1993
EPA's records for City of Gaston go back to 1993. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 29 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 3 |
| 2000s | 0 | 3 |
| 2010 to October 18, 2016 | 0 | 23 |
| October 19, 2016 to 2019 | 0 | 3 |
| 2020s | 0 | 7 |
Most recent health-based violation before October 19, 2016: Total Coliform, began June 1993, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1993 | Resolved |
Where the water comes from
City of Gaston buys its water from Hillsboro-Cherry Grove and Joint Water Commission. It lists no wells or intakes of its own. 1 other community water system buys water from City of Gaston.
Buys water from
- Hillsboro-Cherry Grove Hillsboro, OR
- Joint Water Commission Hillsboro, OR
Community systems that buy water from it
- Cove Orchard Water Association Yamhill, OR
Annual water quality report
City of Gaston 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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