Well Water in Genesee County, Michigan

Genesee County · Population ~400,000 (county) · Aquifer: Glacial Drift / Saginaw Formation

Hardness: 200-400 PPM — Hard to Very Hard

Not the Flint Crisis — But Real Concerns

Let's be clear: the Flint water crisis was about lead leaching from corroded municipal pipes after the city switched water sources without proper corrosion control. It was not about groundwater contamination. If you're on a private well outside Flint, you're drawing from an entirely different water source.

But the crisis did one important thing: it made everyone in Genesee County think about their water. And that's a good thing, because private wells here have their own issues that need attention.

Arsenic in Genesee County

Arsenic occurs naturally in Genesee County's glacial drift aquifer. The glacial deposits that blanket the county contain arsenic-bearing minerals, and wells that tap certain layers can produce water above the EPA's 10 ppb maximum contaminant level.

Unlike industrial contamination, this arsenic has always been there — it's a product of the geology. Test your well at least once for arsenic. See our arsenic guide.

PFAS Investigation

Michigan's PFAS Action Response Team has investigated sites in Genesee County, including areas near airports and industrial facilities where PFAS-containing firefighting foam was used. Groundwater testing has revealed PFAS at several locations.

If you're within a few miles of Flint's Bishop Airport or any industrial facility that used foam suppression systems, consider testing for PFAS. See our PFAS guide.

Testing Recommendations

Annual testing should include bacteria (total coliform and E. coli), nitrates, and pH. Test at least once for arsenic, hardness, iron, and manganese. If your home has older plumbing, consider a lead and copper test — the same corrosion concerns that affected Flint's pipes can affect private plumbing.

See our testing guide for labs and costs.