Deer Park National Pollutant Discharge Elimination System (NPDES)

What is NPDES?

National Pollutant Discharge Elimination System (NPDES) is a permit program to control water pollution by regulating point sources that discharge pollutants into waters of the United States.

Polluted stormwater runoff is commonly transported through municipal separate storm sewer systems (MS4s), and then often discharged, untreated, into local water bodies. An MS4 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, and
  • not part of a sewage treatment plant, or publicly owned treatment works (POTW).

To prevent harmful pollutants from being washed or dumped into specific types of MS4s, operators are required to obtain an NPDES permit and develop a stormwater management program plan (SMPP). The Village of Deer Park is an MS4 operator under the IEPA’s General Permit for Discharges.

A copy of the 2017 IEPA Notice of Intent can be found here: NOI Link (PDF)

A copy of the Village of Deer Park Year 20 Annual Report can be found here: Annual Report Link (PDF)

The last 5 years of the Deer Park Annual Report can be found here:  Year 12 (PDF), Year 13 (PDF), Year 14 (PDF), Year 15 (PDF)Year 16 (PDF), Year 17 (PDF), Year 18 (PDF), Year 19 (PDF)

Village of Deer Park Stormwater Management Program Plan: SMPP Link (PDF)

Village of Deer Park Discharge Detection and Elimination Program: IDDE Link (PDF)

Report a Concern

Contact the Village of Deer Park regarding problems with drainage features or illegal dumping into the storm sewer system. You can report complaints here: Complaint Online Form

Climate change description and link: 

Climate change refers to any - change in the measures of climate lasting for an extended period of time. Climate change includes major changes in temperature, precipitation, or wind patterns, among other effects, that occur over several decades or longer. As a requirement of the Village’s general NPDES Permit ILR40, consideration of impacts and effects of climate change on storm water, storm water controls, flood management and BMP implementation. View the EPA’s climate change website.

Public Outreach:

Protecting Water Quality from Urban Runoff (PDF)

Drainage Around Your Home (PDF)

After the Storm - A Citizen’s Guide to Managing Stormwater (PDF)