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I think you're right based on this article: https://www.cnn.com/2023/03/14/health/pfas-water-filters-wel...

PFAS looks to be removable with activated carbon or reverse osmosis filters.

EDIT: I think you're right that it's possible. idk if municipalities usually use these filters

Surely the municipalities actually test the water though, especially since these chemicals are a decades-old issue across the world, I can't imagine it wouldn't be a standard thing to look for before determining the safety of water.

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