Wow, 4 ppt is much more aggressive than the previous limit.
My well water was contaminated by Wolverine/3M to 90 ppt, we got a settlement because it was greater than 70 ppt. They installed GAC filters in my home to limit the contamination to 10 ppt. Here are the old limits:
My well water was contaminated by Wolverine/3M to 90 ppt, we got a settlement because it was greater than 70 ppt. They installed GAC filters in my home to limit the contamination to 10 ppt. Here are the old limits:
https://www.michigan.gov/pfasresponse/drinking-water/mcl