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MASON, CITY OF

Michigan — Community Water System — PWSID: MI0004170

System Information

PWSIDMI0004170
System NameMASON, CITY OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region05
Serves SchoolNo
WholesalerNo
First ReportedFeb 3, 1981
Last ReportedDec 18, 2025

Location & Contact

StateMichigan
CityMASON
ZIP Code48854
Address345 N JEFFERSON ST
OrganizationREWERTS, JEFF
Phone517-290-5681

Population & Service

Population Served8,252
Service Connections3,200

Drinking Water Violations (44)

This water system has 44 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, 2023 — Consumer Confidence Rule Other No No — — — Resolved Nov 30, 2023 Consumer Confidence Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Nov 30, 2023 Consumer Confidence Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jan 1, 2022 Mar 31, 2022 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Resolved Mar 31, 2022 Radionuclides and Revised Rad Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Aug 6, 2021 Consumer Confidence Rule
Jul 1, 2021 — Consumer Confidence Rule Other No No — — — Resolved Aug 6, 2021 Consumer Confidence Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Jan 4, 2005 Jan 13, 2009 Combined Radium (-226 and -228) MCL Yes No 7 PCI/L 5 pCi/L — Resolved Jan 13, 2009 Radionuclides and Revised Rad Rule
Oct 1, 2003 Oct 31, 2003 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2003 Total Coliform Rule
Oct 1, 2003 Oct 31, 2003 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Oct 31, 2003 Total Coliform Rule
Jan 1, 1999 Dec 31, 1999 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 1999 Radionuclides and Revised Rad Rule
Jan 1, 1999 Dec 31, 1999 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 1999 Radionuclides and Revised Rad Rule
Jan 1, 1999 Dec 31, 1999 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 1999 Radionuclides and Revised Rad Rule
Jan 1, 1999 Dec 31, 1999 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Dec 31, 1999 Radionuclides and Revised Rad Rule
May 1, 1998 May 31, 1998 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 1998 Total Coliform Rule
May 1, 1998 May 31, 1998 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 1998 Total Coliform Rule
May 1, 1998 May 31, 1998 Coliform (TCR) MR No No — 5% of samples — Resolved May 31, 1998 Total Coliform 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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