ROCK RAPIDS, IA · Lyon County
LYON-SIOUX RWS-DOON Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Iowa’s official records. Always confirm current status with Iowa before making decisions based on this information.
System facts
- System ID (PWSID)
- IA6000733
- System type
- Community Water System
- Population served
- 1,765
- Service connections
- 706
- Ownership
- privately owned
- Water source
- groundwater (wells)
Violation history
Monitoring, Regular
—Nitrate
July 1, 2018 – June 30, 2019
ResolvedMaximum Contaminant Level Violation, Single Sample
Health-basedNitrate
October 1, 1984 – February 28, 1985
ArchivedMaximum Contaminant Level Violation, Single Sample
Health-basedNitrate
October 1, 1983 – December 31, 1983
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2018 – June 30, 2019 | Monitoring, Regular | Nitrate | — | Resolved |
| October 1, 1984 – February 28, 1985 | Maximum Contaminant Level Violation, Single Sample | Nitrate | Health-based | Archived |
| October 1, 1983 – December 31, 1983 | Maximum Contaminant Level Violation, Single Sample | Nitrate | Health-based | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- August 1, 2019State Formal Notice of Violation issued5 linked violations
- January 26, 1998State Formal Notice of Violation issued1 linked violation
- June 21, 1994State Public Notification requested2 linked violations
- June 21, 1994State Bilateral Compliance Agreement signed2 linked violations
- June 21, 1994State Formal Notice of Violation issued3 linked violations
- December 11, 1989State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
- October 9, 1989State Compliance achieved1 linked violation
- February 16, 1982State Unresolvedgeneral compliance action — not tied to a specific violation on record
Contact
LYON-SIOUX RURAL WATER SYSTEM
712-472-3755
ROCK RAPIDS, IA 51246