Public water system record
Lyon-Sioux RWS-Doon
Serves Doon, Lyon County, IA · 1,765 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Lyon-Sioux RWS-Doon 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
- Lyon-Sioux RWS-Doon draws water from 12 wells.
- Most recent formal enforcement: signed compliance agreement by Iowa, June 1994.
- Record on file since 1983, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 715 service lines.
Check whether Lyon-Sioux RWS-Doon 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 |
|---|---|---|
|
Nitrate
Monitoring and reporting
|
Jul 1, 2018 | Resolved |
Full record since 1983
EPA's records for Lyon-Sioux RWS-Doon go back to 1983. Before October 19, 2016 they list 3 health-based violations (1 resolved, 2 archived by EPA without a recorded fix) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 2 | 0 |
| 1990s | 1 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began January 1994, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 1994 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 1984 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Oct 1, 1983 | Archived |
Enforcement actions
Iowa regulators took 1 formal enforcement action against Lyon-Sioux RWS-Doon in 1994, filed as 2 records in EPA's data. The most recent was a signed compliance agreement in June 1994.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jun 21, 1994 | Iowa | Signed compliance agreement | 2 violations (2 health-based): Nitrate |
Where the water comes from
Lyon-Sioux RWS-Doon draws water from 12 wells. It also buys water from Lyon-Sioux RWS-Boyden, Lyon-Sioux RWS-Rock Rapids and Lyon-Sioux RWS-Big Sioux. 5 other community water systems buy water from Lyon-Sioux RWS-Doon.
Buys water from
- Lyon-Sioux RWS-Boyden Rock Rapids, IA
- Lyon-Sioux RWS-Rock Rapids Rock Rapids, IA
- Lyon-Sioux RWS-Big Sioux Rock Rapids, IA
Community systems that buy water from it
- Alvord Municipal Water Supply Alvord, IA
- Doon Water Supply Doon, IA
- Inwood Water Supply Inwood, IA
- Lyon-Sioux RWS-Boyden Rock Rapids, IA
- Lyon-Sioux RWS-Rock Rapids Rock Rapids, IA
Annual water quality report
Lyon-Sioux RWS-Doon 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