1120 SW 5th Avenue, Room 1000, Portland, OR 97204
General NPDES Permit and related materials for stormwater discharges associated with industrial activity in Portland.
General NPDES Permit for industrial facilities discharging stormwater to the Columbia Slough
Includes forms and instructions to obtain coverage under the 1200-Z or 1200-COLS General NPDES Stormwater Permit.
BES Compliance Guidance Factsheet for the new 1200-COLS Permit
BES Compliance Guidance Factsheet for the new 1200-Z Permit
General NPDES Permit for industrial facilities discharging stormwater to waters of the state.
Information about stormwater regulations and the types of facilities that require a NPDES Stormwater Discharge Permit.