Recent testing shows at least seven schools have drinking water with PFAS levels higher than the state standard of 20 parts per trillion, according to Maine's latest report.
The lawsuit follows a move in March in Auburn to rezone 148 acres near the lake, as well as ongoing discussions about updating septic design standards in the watershed.
Lewiston wants a prohibition on development in the Lake Auburn watershed without its written consent and the approval of the Maine Drinking Water Program.