Farmington Logo

City Hall
430 Third Street

Natural Resource Staff

Jen Dullum
Natural Resource Specialist

Engineering Staff

Kevin Schorzman
P.E. City Engineer



Farmington’s NPDES Requirements and Storm Water Pollution Prevention Program (SWPPP)

Lakes, rivers, streams and wetlands are among the most important natural resources for Minnesotans and everyone can do their part to protect the quality of these resources for future generations. But when rain falls on hard surfaces such as paved streets, parking lots and rooftops it flows across these areas and picks up and carries materials that can pollute our water resources. Polluted runoff can contain soil, oil, grease, fertilizer, trash and pet waste. These pollutants end up being transported though the municipal separate storm sewer systems (MS4s) and do not go to treatment plants but discharge into small ponds, streams and wetlands in the community. Eventually this water moves, either through the ground or from pond to pond, to the Vermillion River, a trophy trout stream that runs through Farmington. Polluted runoff can severely reduce the quality of water we fish from, swim in and drink. 

An amendment in 1987, to the Federal Clean Water Act required implementation of a two-phase national program to address storm water runoff and its associated pollutants. Phase I regulated construction sites larger than five acres, 10 categories of industrial facilities and major metropolitan cities. In Minnesota, the cities affected by Phase I of the storm water program were Minneapolis and St. Paul.

In 2003, Phase II was implemented to include construction sites greater than one acre and smaller municipalities. Farmington is required to follow National Pollutant Discharge Elimination System (NPDES) Phase II requirements since the population is over 10,000 (based on census data). Under Phase II operators of small MS4s needed to obtain authorization from the Minnesota Pollution Control Agency (MPCA) to discharge storm water runoff to surface water. The permit is designed to prevent items considered pollutants from being washed by storm water runoff into the municipal storm sewer and then discharged from the storm sewer into local waterbodies.

The MPCA reissued the NPDES Phase II permit effective August 1, 2013, requires municipalities to submit a revised application and update our Stormwater Pollution Prevention Program (SWPPP). A complete version of the new MS4 General Permit and Stormwater Permit are available on the SWPPP page.


City of Farmington • 430 Third Street • Farmington, MN 55024 • 651-280-6800