Lakeville, MN Environmental Rules: Stormwater Management (2026)

Lakeville City Code section 7-16-3, Stormwater and Urban Runoff Control, protects the storm drain system from illegal disposal, dumping, and illicit discharges and connections. Subsection A bars leaving, throwing, dumping, or depositing any substance that could become a pollutant on a street, sidewalk, storm sewer element, or public or private lot, and separately bars intentionally disposing of grass, leaves, dirt, or landscape material into surface water, a buffer, a street, sidewalk, or the storm sewer system. Illicit discharges into the storm sewer system or surface water are prohibited unless authorized by an NPDES point source permit obtained from the Minnesota Pollution Control Agency (MPCA) or tied to firefighting.

Exempt discharges include water line flushing, landscape irrigation, diverted stream flows, foundation and footing drains, air conditioning condensation, and dechlorinated swimming pool water. Section 7-16-3(B) sets owner and occupant duties: recreational vehicle sewage must go to a sanitary waste facility, pool water must sit seven days without added chlorine before discharge, mobile washing companies must send wastewater to the sanitary sewer, and machinery repaired in runoff-prone areas must be confined to contain leaks. Industrial facilities holding an MPCA general stormwater permit must comply with that permit, including preparing a stormwater pollution prevention plan (SWPPP).

Construction site operators must conduct concrete truck washout under the MPCA construction permit, perform daily litter cleanup, keep solid waste in an enclosed area, and store chemicals and fertilizer away from surface waters. Anyone responsible for a facility with a known or suspected pollutant release must notify the City immediately for hazardous materials or by the next business day for nonhazardous materials. The City may inspect buildings and sites, require monitoring equipment, and, if refused access, seek a search warrant to verify compliance.