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SIOUX CITY WATER SUPPLY

Iowa — Community Water System — PWSID: IA9778054

System Information

PWSIDIA9778054
System NameSIOUX CITY WATER SUPPLY
System TypeCommunity Water System
Water SourceGround Water Under Influence
Activity StatusActive
Owner TypeLocal
EPA Region07
Serves SchoolNo
WholesalerNo
First ReportedFeb 27, 1979
Last ReportedDec 19, 2025

Location & Contact

StateIowa
CitySIOUX CITY
ZIP Code51103
AddressATTN KEVIN KENNEDY WATER SUPT
OrganizationSIOUX CITY WATER SUPPLY
Phone712-279-6150

Population & Service

Population Served85,791
Service Connections29,424

Drinking Water Violations (128)

This water system has 128 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
May 1, 2024 May 31, 2024 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 TTHM MR No No — 0.080 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 TTHM MR No No — 0.080 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 TTHM MR No No — 0.080 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 TTHM MR No No — 0.080 mg/L — Resolved May 31, 2024 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .084 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .084 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .084 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .084 MG/L 0.080 mg/L — Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .083 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .083 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .083 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .083 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Sep 30, 2019 TTHM MCL Yes No .083 MG/L 0.080 mg/L — Resolved Sep 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Mar 6, 2017 Mar 7, 2017 Epichlorohydrin TT Yes No — TT — Resolved Mar 7, 2017 Synthetic Organic Chemicals
Mar 6, 2017 Mar 7, 2017 Epichlorohydrin TT Yes No — TT — Resolved Mar 7, 2017 Synthetic Organic Chemicals
Mar 6, 2017 Mar 7, 2017 Epichlorohydrin TT Yes No — TT — Resolved Mar 7, 2017 Synthetic Organic Chemicals
Nov 25, 2016 Nov 26, 2016 Epichlorohydrin TT Yes No — TT — Resolved Nov 26, 2016 Synthetic Organic Chemicals
Nov 25, 2016 Nov 26, 2016 Epichlorohydrin TT Yes No — TT — Resolved Nov 26, 2016 Synthetic Organic Chemicals
Nov 25, 2016 Nov 26, 2016 Epichlorohydrin TT Yes No — TT — Resolved Nov 26, 2016 Synthetic Organic Chemicals
Nov 25, 2016 Nov 26, 2016 Epichlorohydrin TT Yes No — TT — Resolved Nov 26, 2016 Synthetic Organic Chemicals
May 19, 2016 May 20, 2016 Epichlorohydrin TT Yes No — TT — Resolved May 20, 2016 Synthetic Organic Chemicals
May 19, 2016 May 20, 2016 Epichlorohydrin TT Yes No — TT — Resolved May 20, 2016 Synthetic Organic Chemicals
May 19, 2016 May 20, 2016 Epichlorohydrin TT Yes No — TT — Resolved May 20, 2016 Synthetic Organic Chemicals
May 1, 2015 May 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved May 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2015 May 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved May 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2015 May 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved May 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2015 May 31, 2015 Interim Enhanced Surface Water Treatment Rule MR No No — — — Resolved May 31, 2015 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2012 Jul 31, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jul 31, 2012 Surface Water Treatment Rule
Jul 1, 2012 Jul 31, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jul 31, 2012 Surface Water Treatment Rule
Jul 1, 2012 Jul 31, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jul 31, 2012 Surface Water Treatment Rule
Jul 1, 2012 Jul 31, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jul 31, 2012 Surface Water Treatment Rule
Jun 1, 2012 Jun 30, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jun 30, 2012 Surface Water Treatment Rule
Jun 1, 2012 Jun 30, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jun 30, 2012 Surface Water Treatment Rule
Jun 1, 2012 Jun 30, 2012 Surface Water Treatment Rule MR No No — — — Resolved Jun 30, 2012 Surface Water Treatment Rule
Apr 1, 2012 Apr 30, 2012 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2012 Surface Water Treatment Rule
Apr 1, 2012 Apr 30, 2012 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2012 Surface Water Treatment Rule
Apr 1, 2012 Apr 30, 2012 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2012 Surface Water Treatment Rule
Apr 1, 2012 Apr 30, 2012 Surface Water Treatment Rule TT Yes No — — — Resolved Apr 30, 2012 Surface Water Treatment Rule
Jul 1, 2007 Jun 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2008 Nitrate Rule
Jul 1, 2007 Jun 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2008 Nitrate Rule
Jul 1, 2007 Jun 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2008 Nitrate Rule
Jul 1, 2007 Jun 30, 2008 Nitrate MR No Yes — 10 mg/L — Resolved Jun 30, 2008 Nitrate Rule
Nov 1, 2004 Nov 30, 2004 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2004 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2004 Nov 30, 2004 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2004 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2004 Nov 30, 2004 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2004 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Nov 1, 2004 Nov 30, 2004 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Nov 30, 2004 Interim and Long Term 1 Enhanced Surface Water Treatment Rule

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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