Environmental Rules in Troutdale, OR (2026)
2 verified environmental rules for Troutdale, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Troutdale operates a municipal stormwater system under an NPDES Phase II MS4 General Permit issued by Oregon DEQ. Storm sewer rules are codified in Troutdale Municipal Code (TMC) Chapter 12.06 (Storm Sewer System) and erosion and sediment control in TMC Chapter 12.09. The Public Works Department's Stormwater Services Division responds to spills and illicit discharges; report a spill via 503-674-3300 (business hours) or 503-251-4163 (after-hours emergency).
Troutdale, OR Stormwater Management Rules
Some RestrictionsFlood Zones
Troutdale participates in the FEMA National Flood Insurance Program and regulates development in Special Flood Hazard Areas (SFHAs) under Troutdale Development Code Chapter 14 (Flood Management), adopted by Ordinance 851 on January 17, 2019. SFHAs cover about 3% of the city — primarily along the Sandy River and Beaver Creek. Chapter 14 requires a 2-foot freeboard above base flood elevation for new and substantially improved residential structures, plus balanced cut-and-fill and engineer certification of no-rise.
Troutdale, OR Flood Zones and Floodplain Rules
Heavy RestrictionsLooking for Multnomah County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Troutdale city rules.
Environmental Rules in Multnomah County →