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LYON-SIOUX RWS-DOON

Iowa — Community Water System — PWSID: IA6000733

System Information

PWSIDIA6000733
System NameLYON-SIOUX RWS-DOON
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypePrivate
EPA Region07
Serves SchoolNo
WholesalerNo
First ReportedFeb 27, 1979
Last ReportedDec 19, 2025

Location & Contact

StateIowa
CityROCK RAPIDS
ZIP Code51246
AddressATTN DAVE HARMSEN
OrganizationLYON-SIOUX RURAL WATER SYSTEM
Phone712-472-3755

Population & Service

Population Served1,765
Service Connections706

Drinking Water Violations (25)

This water system has 25 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 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2019 Nitrate Rule
Jul 1, 2018 Jun 30, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2019 Nitrate Rule
Jul 1, 2018 Jun 30, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2019 Nitrate Rule
Jul 1, 2018 Jun 30, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2019 Nitrate Rule
Dec 1, 1997 Dec 31, 1997 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1997 Nitrate Rule
Dec 1, 1997 Dec 31, 1997 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1997 Nitrate Rule
Dec 1, 1997 Dec 31, 1997 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1997 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Jan 1, 1994 Mar 31, 1994 Nitrate MCL Yes No 11 10 mg/L — Resolved Mar 31, 1994 Nitrate Rule
Oct 1, 1984 Feb 28, 1985 Nitrate MCL Yes No 11 10 mg/L 10 Archived Feb 28, 1985 Nitrate Rule
Oct 1, 1983 Dec 31, 1983 Nitrate MCL Yes No 14.22 10 mg/L 10 Archived Dec 31, 1983 Nitrate Rule
— — — 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.

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