Montana PFAS Sites
Live data
Updated continuously
The current reading for this indicator updates live on the
Montana Gateway dashboard.
The data feed below is fetched from EPA PFAS Analytic Tools · state environmental agency via the
public /api/pfas endpoint.
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What this means
PFAS (per- and polyfluoroalkyl substances) are a family of ~12,000 man-made chemicals nicknamed "forever chemicals" because they don't break down in the environment or the human body. The EPA set the first federal enforceable drinking-water limits in 2024. States track confirmed contamination sites — many from military bases, industrial sites, and firefighting foam.
What you can do
- If you're on a private well within a few miles of a known PFAS site, ask your state environmental agency about free well testing.
- Boiling water does NOT remove PFAS — use a certified reverse osmosis or activated-carbon filter rated for PFAS.
- Check your annual Consumer Confidence Report from your water utility — federal MCLs for PFOA/PFOS are 4 ng/L (2024).
- Health effects with long exposure: thyroid, liver, immune-system, and some cancers — talk to your doctor if you're concerned.
Official sources & resources
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