Ogemaw County, MI
drinking water quality
20,985 residents · 118 public water systems · 5 ZIP codes
EPA sampled 1 of 118 public water systems here, together serving about 38 people. Last sampled 7/15/2025.
Health-based violations
Separately from PFAS, EPA records 5 health-based violations across 4 of the county’s water systems since 2020, the most recent in 2024. They involved contaminant 0400, lead and copper.
What this means
PFAS are industrial chemicals that EPA describes as breaking down only very slowly in the environment. In April 2024 EPA set the first enforceable national limits: 4 ng/L for PFOA and PFOS, 10 ng/L for PFHxS, PFNA and GenX.
These figures are county-level and come from EPA’s sampling of public water systems. They describe the worst result found in the county, not what comes out of any particular tap — that depends on which system serves the address, and on the plumbing in the building. A private well is not covered by this programme at all.
ZIP codes in Ogemaw County
48635 · 48654 · 48661 · 48756 · 48761
Readings are county-level, so every ZIP here shares the figure above. Search your ZIP on the map to see it in context.