The Biden administration’s rule set standards for two common types of PFAS at 4 parts per trillion, effectively the lowest level at which they can be reliably detected. Standards for several other PFAS chemicals were set, too, and utilities must meet those levels by 2029.

Key takeaways - New EPA rule sets strict enforceable limits on six PFAS chemicals, including 4 ppt for PFOA and PFOS - Public water systems have five

The Trump administration will set limits on the amount of “forever chemicals” producers of the toxic substances can discharge into the water, the Environmental Protection Agency (EPA) announced Monday.