As climate change and other factors increase stress on scarce groundwater resources, EPA is working to revise key regulatory policies, including those under Superfund, the Clean Water Act (CWA) and Safe Drinking Water Act (SDWA), though review of the policies is already raising concern from states, industry groups and environmentalists. But the issue is complicated by a series of factors, including the lack of technology to remediate some groundwater contamination, a lack of clear regulatory authority, uncertainty over the availability...