County · Michigan
Bay County, Michigan: drinking water records
This overview covers 10 ZIP codes and 23 community water systems in Bay County. It also stands in for 2 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Bay City, City of MI0000470 | 32,255 | 120 | 0 | 1 | 10 ppb |
| Essexville, City of MI0002180 | 3,478 | 120 | 0 | 1 | 0 ppb |
| Bangor Township MI0000390 | 11,999 | 120 | 0 | 0 | 1.3 ppb |
| Hampton Township MI0002960 | 9,652 | 120 | 0 | 0 | 0 ppb |
| Bay Co. Dept of Water & Sewer MI0000485 | 8,465 | 120 | 0 | 0 | 3.5 ppb |
| Williams Township MI0007125 | 5,444 | 120 | 0 | 0 | 0 ppb |
| Monitor Township MI0004440 | 5,217 | 120 | 0 | 0 | 0 ppb |
| Frankenlust Township MI0002410 | 3,626 | 120 | 0 | 0 | 1.4 ppb |
| Kawkawlin Township MI0003565 | 3,170 | 0 | 0 | 1 | 0 ppb |
| Bangor-Monitor Metro District MI0000400 | 2,971 | 0 | 0 | 0 | 0 ppb |
| Auburn MI0000300 | 2,087 | 0 | 0 | 0 | 2 ppb |
| Kawkawlin Metro Dist Water Sup MI0003570 | 1,480 | 0 | 0 | 0 | 0 ppb |
| Pinconning Township MI0005335 | 1,479 | 0 | 0 | 0 | 0 ppb |
| Merritt Township MI0004280 | 1,474 | 0 | 0 | 0 | 1 ppb |
| Fraser Township MI0002465 | 1,226 | 0 | 0 | 0 | 0 ppb |
| Beaver Township MI0000518 | 1,211 | 0 | 0 | 0 | 0 ppb |
| Pinconning, City of MI0005330 | 1,204 | 0 | 0 | 0 | 1.3 ppb |
| Linwood Metropolitan District MI0003910 | 909 | 0 | 0 | 0 | 5 ppb |
| Walden Woods MHC FL6094892 | 900 | 0 | 0 | 0 | 0.7 ppb |
| Beaver Road Area Water Assoc. MI0000517 | 829 | 0 | 0 | 0 | 0 ppb |
| Portsmouth Township MI0005540 | 535 | 0 | 0 | 0 | 0 ppb |
| Thunderbird MHP FL6091816 | 46 | 0 | 0 | 0 | 1.3 ppb |
| Bay Area Water System MI0000465 | 0 | 0 | 0 | 0 | 6 ppb |
ZIP reports in Bay County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 48613, 48634.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.