Public water system record
City of Riddle
Serves an area of Douglas County, OR that includes Riddle · 1,224 people served
Federal records show no health-based violations and 43 monitoring/reporting issues for City of Riddle 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
- 43
Key facts
- City of Riddle draws water from 1 surface water intake.
- Record on file since 1976, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 544 service lines.
Check whether City of Riddle 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.
|
|
Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2025 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
May 1, 2024 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Nov 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Oct 1, 2023 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2023 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jul 1, 2021 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2020 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2020 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Feb 1, 2019 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Dec 1, 2018 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
Full record since 1976
EPA's records for City of Riddle go back to 1976. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 35 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 0 | 10 |
| 1990s | 3 | 9 |
| 2000s | 0 | 12 |
| 2010 to October 18, 2016 | 0 | 4 |
| October 19, 2016 to 2019 | 0 | 14 |
| 2020s | 0 | 29 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began December 1998, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 1998 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 1995 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 1994 | Resolved |
Where the water comes from
City of Riddle draws water from 1 surface water intake. 2 other community water systems buy water from City of Riddle.
Community systems that buy water from it
- Lawson Acres Water Association Riddle, OR
- South Umpqua Water Association Riddle, OR
Annual water quality report
City of Riddle 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