MASON CO EASTERN HS
Michigan — Non-Transient Non-Community — PWSID: MI2007253
System Information
| PWSID | MI2007253 |
| System Name | MASON CO EASTERN HS |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 05 |
| Serves School | Yes |
| Wholesaler | No |
| First Reported | Jan 18, 1984 |
| Last Reported | Jun 5, 2025 |
Location & Contact
| State | Michigan |
| City | CUSTER |
| ZIP Code | 49405 |
| Address | 18 S MAIN ST |
| Organization | MASON CO EASTERN DISTRICT ADMIN |
| Phone | 231-757-3733 |
Population & Service
| Population Served | 480 |
| Service Connections | 1 |
Drinking Water Violations (12)
This water system has 12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2020 | — | MR | No | No | — | TT | — | Resolved | Jul 31, 2023 | — | |
| Jan 1, 2018 | — | MR | No | No | — | TT | — | Resolved | Sep 24, 2018 | — | |
| Oct 1, 2017 | Dec 31, 2017 | MON | No | Yes | — | — | — | Resolved | Dec 31, 2017 | — | |
| Jan 1, 2017 | — | MR | No | No | — | TT | — | Resolved | Sep 24, 2018 | — | |
| Jan 1, 2017 | — | MR | No | No | — | TT | — | Resolved | Sep 24, 2018 | — | |
| Jan 1, 2017 | Dec 31, 2017 | MR | No | Yes | — | 10 mg/L | — | Resolved | Dec 31, 2017 | — | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 1998 | — | |
| Apr 1, 1998 | Jun 30, 1998 | MR | No | Yes | — | 10 mg/L | — | Resolved | Jun 30, 1998 | — | |
| Oct 1, 1996 | Dec 31, 1996 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Dec 31, 1996 | — | |
| Oct 1, 1996 | Dec 31, 1996 | MCL | Yes | No | 11 | 10 mg/L | — | Resolved | Dec 31, 1996 | — | |
| Jan 1, 1995 | Mar 31, 1995 | MCL | Yes | No | — | 5% of samples | — | Resolved | Feb 15, 1995 | — | |
| Oct 1, 1994 | Dec 31, 1994 | MCL | Yes | No | — | 5% of samples | — | Archived | Dec 31, 1994 | — |
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.