Pollutant Discharge Elimination System (NPDES)

Osceola County NPDES Program

The federal National Pollutant Discharge Elimination System (NPDES) stormwater permitting program had been developed by the U.S. Environmental Protection Agency (EPA). The program was developed in two phases:

Phase I addresses "large" and "medium" municipal separate storm sewer systems which are located in incorporated places and counties with populations of 100,000 or more, and eleven categories of industrial activity, one of which is large construction activity that disturbs 5 or more acres of land.

Phase II addresses additional sources including municipal separate storm sewer systems not regulated under Phase I, and small construction activity disturbing between 1 and 5 acres.

NPDES Program Facts

Osceola County has a Municipal Separate Storm Sewer System (MS4) NPDES permit to discharge stormwater to water of the state (lakes and streams) this permit is issued by The Florida Department of Environmental Protection.

Osceola County’s first NPDES MS4 permit was issued in 2003, each permit is in effect for 5 years.

The permit consist of 6 different minimum control measures the County must implement for best management practices, they are as follows:

  1. Public Education and Outreach
  2. Public Participation and Involvement
  3. Illicit Discharge Detection and Elimination
  4. Construction Site Run Off Control
  5. Post Construction Run Off Control
  6. Pollution Prevention and Good Housekeeping

Osceola County has an Illicit Discharge Ordinance #08-28(PDF, 217KB), which states only rainwater runoff is allowed in the stormwater system.

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