Welcome to the County of Berks
Phase II NPDES Storm Water Regulations

Municipal Separate Storm Sewer Systems (MS4s) Overview
Under the 1987 Clean Water Act Amendments, the U.S. EPA developed new stormwater regulations to address storm water that might impact water quality. These new regulations were set up in two Phases depending upon population. Phase I, which affected municipalities with 100,000 or more in population that did not have combined sewers included Allentown and Philadelphia. Phase II of the regulation affected about 1,000 additional municipalities in Pennsylvania. Those municipalities that are located within an "urbanized area" as defined by the 1990 Census and the 2000 Census were required to apply for a National Pollutant Discharge Eliminations System (NPDES) permit to discharge stormwater from their municipal separate storm sewer system (MS4). Berks County is included in this Phase II NPDES Permitting.
There are a number of educational items that are found on our website that you may use to increase your knowledge of storm water issues. Please feel free to use the links to various websites also for more information. If you have any questions or would like further information please feel free to call us at 610-478-6300.
The Berks County Planning Commission participates with the Berks County MS4 Steering Committee and the Berks County Cooperative Education Program.