LYON-SIOUX RWS-DOON
Iowa — Community Water System — PWSID: IA6000733
System Information
| PWSID | IA6000733 |
| System Name | LYON-SIOUX RWS-DOON |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 27, 1979 |
| Last Reported | Mar 17, 2026 |
Location & Contact
| State | Iowa |
| City | ROCK RAPIDS |
| ZIP Code | 51246 |
| Address | ATTN DAVE HARMSEN |
| Organization | LYON-SIOUX RURAL WATER SYSTEM |
| Phone | 712-472-3755 |
Population & Service
| Population Served | 1,765 |
| Service Connections | 706 |
Drinking Water Violations (26)
This water system has 26 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Jul 1, 2018 | Jun 30, 2019 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 2019 | — | |
| Dec 1, 1997 | Dec 31, 1997 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1997 | — | |
| Dec 1, 1997 | Dec 31, 1997 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1997 | — | |
| Dec 1, 1997 | Dec 31, 1997 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 1997 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Jan 1, 1994 | Mar 31, 1994 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Mar 31, 1994 | — | |
| Oct 1, 1984 | Feb 28, 1985 | MCL | Yes | No | 11 | 10 mg/L | 10 | Archived | Feb 28, 1985 | — | |
| Oct 1, 1983 | Dec 31, 1983 | MCL | Yes | No | 14.22 | 10 mg/L | 10 | Archived | Dec 31, 1983 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.