MASON, CITY OF
Michigan - Community Water System - PWSID: MI0004170
System Information
| PWSID | MI0004170 |
| System Name | MASON, CITY OF |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 05 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 3, 1981 |
| Last Reported | Mar 30, 2026 |
Location & Contact
| State | Michigan |
| City | MASON |
| ZIP Code | 48854 |
| Address | 345 N JEFFERSON ST |
| Organization | REWERTS, JEFF |
| Phone | 517-290-5681 |
Population & Service
| Population Served | 8,252 |
| Service Connections | 3,200 |
Drinking Water Violations (54)
This water system has 54 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 | - | Other | No | No | - | - | - | Resolved | Nov 30, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Nov 30, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2023 | Dec 31, 2023 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Dec 31, 2023 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2022 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2022 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2022 | - | |
| Jan 1, 2022 | Mar 31, 2022 | MR | No | Yes | - | 5 pCi/L | - | Resolved | Mar 31, 2022 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Aug 6, 2021 | - | |
| Jul 1, 2021 | - | Other | No | No | - | - | - | Resolved | Aug 6, 2021 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Jan 4, 2005 | Jan 13, 2009 | MCL | Yes | No | 7 PCI/L | 5 pCi/L | - | Resolved | Jan 13, 2009 | - | |
| Oct 1, 2003 | Oct 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2003 | - | |
| Oct 1, 2003 | Oct 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2003 | - | |
| Oct 1, 2003 | Oct 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2003 | - | |
| Oct 1, 2003 | Oct 31, 2003 | MCL | Yes | No | - | 5% of samples | - | Resolved | Oct 31, 2003 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 1999 | - | |
| Jan 1, 1999 | Dec 31, 1999 | MR | No | Yes | - | 15 pCi/L | - | Resolved | Dec 31, 1999 | - | |
| May 1, 1998 | May 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1998 | - | |
| May 1, 1998 | May 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1998 | - | |
| May 1, 1998 | May 31, 1998 | MR | No | No | - | 5% of samples | - | Resolved | May 31, 1998 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 21, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 21, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 21, 1997 | - | |
| Aug 1, 1997 | Aug 31, 1997 | MCL | Yes | No | - | 5% of samples | - | Resolved | Aug 21, 1997 | - |
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.