EPA is grappling with its options for providing policy “clarity” to the Supreme Court’s decision finding discharges of pollutants that travel through groundwater to surface waters can require a Clean Water Act (CWA) permit, says Region 4 chief Mary Walker, including potential rulemaking, guidance, and other measures. On a recent American Bar Association (ABA) webinar, Walker also suggested that states are likely in the best position to make groundwater permitting decisions. “We are assessing the best way that we can...