(NEWSnet/AP) — The Environmental Protection Agency will propose restrictions on harmful “forever chemicals” in drinking water.

The developments come as the agency says PFAS are dangerous in amounts so small as to be undetectable. 

But experts say removing them will cost billions, a burden that will fall hardest on small communities with few resources.

The EPA said last year that PFAS could cause harm at levels “much lower than previously understood.”

There is also evidence the compounds are linked to low birthweight, kidney cancer and a slew of other health issues.

It’s unclear what the EPA will now propose and how well it will protect people from these recently-understood harms.

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