Since the Clean Water Act was passed in 1972, there has been extensive debate over which waters may be regulated as waters of the United States under the act. Yesterday, Bob Wilkinson explained how this issue came to a head in a recent 9th Circuit opinion and how, in response, EPA is requesting comments on whether pollutant discharges from point sources that reach jurisdictional surface waters via groundwater or other subsurface flow with a direct hydrologic connection to the jurisdictional surface water may be subject to regulation under the Clean Water Act. This is important to you because farmers, manufacturers, and anyone who conducts activities that release pollutants to groundwater will be affected by whether and how EPA clarifies its position regarding whether these discharges are subject to regulation. Our Environmental team blogged about this topic yesterday, please read more here.