Public water system record
Doon Water Supply
Serves Doon, Lyon County, IA · 619 people served
Federal records show no health-based violations and 4 monitoring/reporting issues for Doon Water Supply 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
- 4
Key facts
- Doon Water Supply buys its water from Lyon-Sioux RWS-Doon.
- Most recent formal enforcement: signed compliance agreement by Iowa, May 2005.
- Record on file since 1980, with 29 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 280 service lines.
Check whether Doon Water Supply 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 |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Aug 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2019 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2017 | Resolved |
Full record since 1980
EPA's records for Doon Water Supply go back to 1980. Before October 19, 2016 they list 29 health-based violations (24 resolved, 5 archived by EPA without a recorded fix) and 29 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 6 | 3 |
| 1990s | 3 | 13 |
| 2000s | 20 | 8 |
| 2010 to October 18, 2016 | 0 | 5 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began October 2006, Resolved.
Show all 29 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.8 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Oct 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12.1 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Aug 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12.7 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Jul 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13.3 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Jun 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
May 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Apr 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.5 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Mar 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Feb 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.7 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Jan 1, 2006 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Dec 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.1 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Nov 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11.7 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Oct 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
Sep 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Aug 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13.4 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
Jul 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 15 mg/L, federal limit 10 mg/L (1.5 times the limit)
|
Jun 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 13 mg/L, federal limit 10 mg/L (1.3 times the limit)
|
May 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.8 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 10.7 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Feb 1, 2005 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
Measured 11 mg/L, federal limit 10 mg/L (1.1 times the limit)
|
Apr 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1994 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1993 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 1992 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 1985 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Mar 12, 1985 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 1982 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Nov 18, 1980 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Nov 1, 1980 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Nov 1, 1980 | Archived |
Enforcement actions
Iowa regulators took 5 formal enforcement actions against Doon Water Supply between 1987 and 2005, filed as 22 records in EPA's data. The most recent was a signed compliance agreement in May 2005.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 3, 2005 | Iowa | Signed compliance agreement | 16 violations (16 health-based): Nitrate |
| May 7, 2004 | Iowa | Signed compliance agreement | 1 violation (1 health-based): Nitrate |
| Jul 24, 1987 | Iowa | Compliance order (no penalty) | 2 violations (2 health-based): Nitrate |
| Jul 24, 1987 | Iowa | Administrative penalty | 1 violation (1 health-based): Nitrate |
| Jul 17, 1987 | Iowa | Signed compliance agreement | 2 violations (2 health-based): Nitrate |
Where the water comes from
Doon Water Supply buys its water from Lyon-Sioux RWS-Doon. It lists no wells or intakes of its own.
Buys water from
- Lyon-Sioux RWS-Doon Rock Rapids, IA
Annual water quality report
Doon Water Supply 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 Iowa.
Certified drinking water labs by state EPA guidance for private wells