Northfield's municipal Stormwater Pollution Prevention Program
The City of Northfield's Stormwater Pollution Prevention Program covers public education, outreach and participation, a plan to detect and eliminate illicit discharges to the storm sewer system, construction-site and post-construction runoff controls, and pollution prevention. The goal of the program is to reduce the discharge of pollutants from the storm sewer system, to the maximum extent practicable.
All construction projects disturbing one acre or more or that are part of a larger common plan of development that ultimately disturbs one acre or more are required to apply for an National Pollutant Discharge Elimination System/State Disposal System (NPDES/SDS) construction stormwater permit through the Minnesota Pollution Control Agency. The permit states that prior to submitting a permit application, the owner must develop a SWPPP for the construction site. The SWPPP is to be kept at the site for the duration of the project and retained in files for three years after the project is completed.
If the construction project disturbs 50 acres or more and discharges to a special or impaired water, the SWPPP must be submitted along with the permit application to the Minnesota Pollution Control Agency 30 days prior to the start of any construction activity.
Municipal Separate Storm Sewer Systems (MS4) permit documents