Municipal Separate Storm Sewer System (MS4)

  1. What is an MS4?
  2. North Huntingdon & MS4
  3. The Problem
  4. Our Management Plan
  5. How You Can Help

Specifically, an MS4, as defined by the Environmental Protection Agency, is a conveyance or system of conveyances that is:

  • Owned by a state, city, town, village, or other public entity that discharges to waters of the U.S.
  • Designed or used to collect or convey stormwater (e.g. storm drains, pipes, ditches)
  • Not a combined sewer
  • Not part of a sewage treatment plant, or publicly owned treatment works