Public water system record
Lyon-Sioux RWS-Boyden
On record as serving Rock Rapids, Lyon County, IA · Serves 605 people
Federal records show no health-based violations and no monitoring or reporting issues for Lyon-Sioux RWS-Boyden 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
- 0
Key facts
- Lyon-Sioux RWS-Boyden draws water from 10 wells.
- Most recent formal enforcement: signed compliance agreement by Iowa, September 1986.
- Record on file since 1979, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 248 service lines.
Check whether Lyon-Sioux RWS-Boyden 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, and no monitoring or reporting violations either.
Full record since 1979
EPA's records for Lyon-Sioux RWS-Boyden go back to 1979. Before October 19, 2016 they list 11 health-based violations (6 resolved, 5 archived by EPA without a recorded fix) and 3 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1970s | 1 | 0 |
| 1980s | 5 | 1 |
| 1990s | 3 | 2 |
| 2000s | 2 | 0 |
Most recent health-based violation before October 19, 2016: Nitrate (acute), began March 2001, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Nitrate (acute)
Contaminant limit exceeded
|
Mar 1, 2001 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
May 1, 2000 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Feb 1, 1996 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Nov 1, 1995 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 1, 1993 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Mar 1, 1986 | Resolved |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jan 27, 1986 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Feb 11, 1985 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Feb 1, 1985 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Aug 18, 1980 | Archived |
|
Nitrate (acute)
Contaminant limit exceeded
|
Jul 2, 1979 | Archived |
Enforcement actions
Iowa regulators took 1 formal enforcement action against Lyon-Sioux RWS-Boyden in 1986. The most recent was a signed compliance agreement in September 1986.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 30, 1986 | Iowa | Signed compliance agreement | 1 violation (1 health-based): Nitrate |
Where the water comes from
Lyon-Sioux RWS-Boyden draws water from 10 wells. It also buys water from Lyon-Sioux RWS-Doon, Lyon-Sioux RWS-Rock Rapids and Rock Valley Rural Water District. 4 other community water systems buy water from Lyon-Sioux RWS-Boyden.
Buys water from
- Lyon-Sioux RWS-Doon Rock Rapids, IA
- Lyon-Sioux RWS-Rock Rapids Rock Rapids, IA
- Rock Valley Rural Water District Rock Valley, IA
Community systems that buy water from it
- Boyden Municipal Water Supply Boyden, IA
- Lyon-Sioux RWS-Doon Rock Rapids, IA
- Lyon-Sioux RWS-Rock Rapids Rock Rapids, IA
- Matlock Water Supply Matlock, IA
Annual water quality report
Lyon-Sioux RWS-Boyden 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