The D.C. Circuit dismissed five states' petition to review EPA's extension of a compliance deadline for a revised national drinking water regulation, which in turn extended the deadline…

The court holds that the owners and operators of public water systems in California violated the national primary drinking water regulations for microbiological contaminants, lead, and copper…

The court holds that the U.S. Environmental Protection Agency (EPA) violated Safe Drinking Water Act §1412(b)(3)(A)'s statutory mandate to use the best available evidence when it implemented…