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Illicit Discharge Detection and Elimination

Best Management Practices (BMPs) in this category are designed to eliminate all substances other than stormwater from entering the stormwater system. The storm drain system flows directly into one of the seven surface waters that receive stormwater discharges from the City of Kalispell without any treatment, which include:

  • Whitefish River
  • Stillwater River
  • Ashley Creek
  • Spring Creek
  • Bowser-Spring Creek
  • Unnamed perennial surface water tributary to Ashley Creek from Foys Lake

The results of illicit discharges are untreated discharges that contribute high levels of pollutants, including heavy metals, toxins, oil and grease, solvents, nutrients, viruses, and bacteria to receiving streams and rivers.

Kalispell's Stormwater Management Programs contains five BMPs in the Illicit Discharge Detection and Elimination category including:

  • ID-1 Kalispell Storm Drain System Mapping
  • ID-2 Illicit Discharge Detection and Elimination (IDDE) Program
  • ID-3 Illicit Discharge Investigations
  • ID-4 Illicit Discharge Ordinance
  • ID-5 Public Education through Public Education Program

What is legal to enter the storm drain system?

"No person shall throw, drain, or otherwise discharge, cause, or allow others under its control to throw, drain, or otherwise discharge into the MS4 any pollutants or waters containing any pollutants, other than storm water." -Kalispell Ordinance 1634

Photos courtesy of Digital Broadway LLC