The Environmental Protection Agency (EPA) has issued a guidance memorandum to help individuals and authorities understand how to apply a Supreme Court decision related to the Clean Water Act. This guidance focuses on situations where pollutants travel through groundwater before reaching the U.S. waters. Although public comments were invited, this document is meant only to clarify existing laws and does not have the force of law itself. More information can be found online or by contacting the EPA directly.
Simple Explanation
The EPA wrote a guide to help people understand a new rule about water pollution, explaining that it talks about how dirty stuff can travel through underground water to reach rivers and lakes. This guide is just meant to explain things a bit better and doesn't make any new laws.