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:
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:
"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