July 7, 2017

Guidelines for Reviewing and Commenting on Municipal Separate Storm Sewer System Minimum Control Measures

When it rains or snows, the water flows on the ground, runs off solid (impervious) surfaces collecting pollutants (such as oil, pesticides, sediments, bacteria, and other pollutants) that are on those surfaces, and carries them into our waterways. This “runoff” can make our waterways an unhealthy place to live, work, and play. Untreated stormwater runoff entering our streams can result in the contamination of our drinking water supplies; prohibitions on swimming, fishing or boating uses; injury or death to aquatic plants and animals; dangers to public health; and increased flooding.  
In many places, this stormwater runoff is conveyed through distinct sewer pipes that bypass the wastewater treatment plants and discharge the polluted runoff directly into our streams and lakes. This system is known as a “municipal separate storm sewer system” or MS4.

You can learn more about the MS4 program and the six minimum control measures here.

You can learn more about how to review and comment on your municipality’s PRP here.

Click here to read a detailed blog on MS4 issues and how you can make a difference.