AP reports (here) that Vermont is worried that stricter EPA limits on a chemical called TFM in drinking water will hurt the fight against the invasive sea lamprey.
Fishing enthusiasts (are) worried that scaling back on the use of TFM could cause lamprey to boom and reverse the gains made against the creature, an invasive species which attaches itself to and can hurt the health of salmon, walleye and other species.
TFM (3-trifluoromethyl-4-nitrophenol) is a larvacide, applied to stream when sea lamprey are still in the larval stage. It impairs mitochondrial ATP production and has been used for decades. But it’s chemically related to the PFOs that have showed up in drinking water supplies in southern New Hampshire. The EPA has been cutting back on the amount of such chemicals which are considered safe, to the point that they are measured in parts per trillion.