The Supreme Court ruled today that pollutant discharges to groundwater may, in some instances, be regulated in the same manner as discharges to navigable surface waters. The decision was a clear rebuff to EPA, which argued that only direct discharges to surface waters are regulable under the Clean Water Act. Coincidentally, the Court’s decision was issued just two days following EPA’s publication of a controversial rule limiting the federal government’s Clean Water Act jurisdiction over wetlands and other surface waters. Continue reading