Environmentalists are opposing a late push by toxicology groups seeking to make the case that the Biden EPA’s Safe Drinking Water Act (SDWA) rule for six PFAS does not meet the law’s regulatory thresholds, charging that the groups, led by a former Trump EPA toxics office nominee, are six months too late in filing their amici brief. Further, the environmentalists, who are respondent-interveners in the case, say the toxicologists are raising new arguments -- such as challenging EPA’s conclusion...