What is NPDES?

The Environmental Protection Agency (EPA) has mandated that certain communities must file for a permit under the Phase II National Pollutant Discharge Elimination System (NPDES) program. This mandate by the EPA is authorized under the Clean Water Act. The goal of this program is to eliminate point source pollution discharging into our waterways. Under the NPDES program, Rockport's drainage system is considered a Municipal Separate Storm Sewer System (MS4). In 1990 Phase I required medium and large cities to obtain a permit to cover their stormwater discharges. Phase II began in 1999 and requires regulated small MS4s in urbanized areas, as well as small MS4s that are outside the urbanized area that are designated by the permitting authority, to obtain permit coverage for their stormwater discharges. Each regulated MS4 is required to develop and implement a stormwater management program to reduce the contamination of stormwater runoff and prohibit illicit discharges. The permit requires that Rockport create a Stormwater Management Plan. This plan must include the following components:

  • Public education and outreach
  • Public involvement and participation
  • Illicit discharge detection and elimination
  • Construction site stormwater runoff control
  • Post-construction stormwater runoff control
  • Good housekeeping in our daily municipal operations.

Show All Answers

1. What is Stormwater?
2. What is NPDES?
3. What is an illicit discharge?
4. What is Municipal Good Housekeeping?
5. What can I do to assist with Municipal Good Housekeeping?