When is a stormwater (NPDES) permit needed?
A construction stormwater permit is required on all construction projects that will be disturbing one or more acres of land. Sites disturbing less than one acre within a larger common plan of development are also required to obtain a stormwater permit. You can apply for a stormwater permit online at: www.pca.state.mn.us/water/stormwater/stormwater-c.