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LOWER SIOUX

Minnesota — Community Water System — PWSID: 055294503

System Information

PWSID055294503
System NameLOWER SIOUX
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedDec 9, 1983
Last ReportedDec 23, 2025

Location & Contact

StateMinnesota
CityMORTON
ZIP Code56270
AddressP.O. Box 308
OrganizationLARSEN, ROBERT L.
Phone507-697-6185

Population & Service

Population Served4,000
Service Connections189

Drinking Water Violations (321)

This water system has 321 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
Jun 26, 2025 — Public Notice Other No No — — — Resolved Jun 26, 2025 Public Notice Rule and Revised PN Rule
Jun 26, 2025 — Public Notice Other No No — — — Resolved Jun 26, 2025 Public Notice Rule and Revised PN Rule
Jul 2, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 27, 2024 Consumer Confidence Rule
Jul 2, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 27, 2024 Consumer Confidence Rule
Jul 2, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 27, 2024 Consumer Confidence Rule
Jul 2, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 27, 2024 Consumer Confidence Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 11, 2024 Revised Total Coliform Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 11, 2024 Revised Total Coliform Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 11, 2024 Revised Total Coliform Rule
May 1, 2024 May 31, 2024 Chlorine MR No No — 4.0 mg/L — Resolved May 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 Chlorine MR No No — 4.0 mg/L — Resolved May 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 11, 2024 Revised Total Coliform Rule
May 1, 2024 May 31, 2024 Chlorine MR No No — 4.0 mg/L — Resolved May 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 May 31, 2024 Chlorine MR No No — 4.0 mg/L — Resolved May 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Jun 11, 2024 Revised Total Coliform Rule
Oct 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 15, 2023 Revised Total Coliform Rule
Oct 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 15, 2023 Revised Total Coliform Rule
Oct 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 15, 2023 Revised Total Coliform Rule
Oct 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Nov 15, 2023 Revised Total Coliform Rule
Aug 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 22, 2023 Revised Total Coliform Rule
Aug 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 22, 2023 Revised Total Coliform Rule
Aug 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 22, 2023 Revised Total Coliform Rule
Aug 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Sep 22, 2023 Revised Total Coliform Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Dec 31, 2020 TTHM MR No Yes — 0.080 mg/L — Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Dec 31, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2019 Dec 31, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2019 Dec 31, 2019 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2019 Nitrate Rule
Jan 1, 2017 Dec 31, 2019 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals
Jan 1, 2017 Dec 31, 2019 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2019 Synthetic Organic Chemicals

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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