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Dennison

Minnesota — Community Water System — PWSID: MN1250021

System Information

PWSIDMN1250021
System NameDennison
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 7, 1983
Last ReportedNov 25, 2025

Location & Contact

StateMinnesota
CityDennison
ZIP Code55018
AddressDennison City Hall
OrganizationDennison City Council
Phone5076457732

Population & Service

Population Served220
Service Connections93

Drinking Water Violations (28)

This water system has 28 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
Apr 1, 2025 Jun 30, 2025 Gross Alpha, Excl. Radon and U MCL Yes No 15.7 PCI/L 15 pCi/L — Archived Jun 30, 2025 Radionuclides and Revised Rad Rule
Apr 1, 2025 Jun 30, 2025 Gross Alpha, Excl. Radon and U MCL Yes No 15.7 PCI/L 15 pCi/L — Archived Jun 30, 2025 Radionuclides and Revised Rad Rule
Apr 1, 2025 Jun 30, 2025 Gross Alpha, Excl. Radon and U MCL Yes No 15.7 PCI/L 15 pCi/L — Archived Jun 30, 2025 Radionuclides and Revised Rad Rule
Apr 1, 2025 Jun 30, 2025 Gross Alpha, Excl. Radon and U MCL Yes No 15.7 PCI/L 15 pCi/L — Archived Jun 30, 2025 Radionuclides and Revised Rad Rule
Oct 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2022 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2022 Dec 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2022 Revised Total Coliform Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Oct 1, 2000 Dec 31, 2000 Gross Alpha, Excl. Radon and U MCL Yes No 18.6 15 pCi/L — Resolved Dec 31, 2000 Radionuclides and Revised Rad Rule
Jan 1, 1994 Dec 31, 1994 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1994 Nitrate Rule
Jan 1, 1994 Dec 31, 1994 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1994 Nitrate Rule
Jan 1, 1994 Dec 31, 1994 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1994 Nitrate Rule
Jan 1, 1994 Dec 31, 1994 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1994 Nitrate Rule
Jan 1, 1994 Dec 31, 1994 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 1994 Nitrate Rule
— — — 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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