Stormwater Management Plans & MS4 Program

Stormwater Management Plans

Watershed-based stormwater management planning is a requirement of Pennsylvania’s Stormwater Management Act (Act 167). The Pennsylvania Department of Environmental Protection oversees the Act 167 program, including designating the watersheds for planning purposes. Through watershed-based planning, municipal stormwater regulations are coordinated so that upstream control requirements in one municipality do not result in downstream flooding in another municipality. The county has completed plans for 10 of its 17 watersheds and is considering completing one countywide plan to complete the remaining watershed plans and update the existing ones. 

Watershed Map and Stormwater Management Plans


Phase II of the NPDES program, often referred to as the MS4 program, requires the county to develop a stormwater program to address stormwater discharges from county facilities. The county department of assets and infrastructure is overseeing this effort with assistance from the planning commission, parks, and other affected departments.