Environmental Rules in Tualatin, OR (2026)
2 verified environmental rules for Tualatin, Oregon, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Stormwater and surface-water management in Tualatin is governed by Tualatin Municipal Code Title 3, Chapter 3-05 (Surface Water Management and Water Quality), under a co-implementation partnership with Clean Water Services (CWS), the regional sanitary and surface-water utility for the Tualatin River Watershed. New development and redevelopment must meet CWS Design and Construction Standards, including erosion-prevention and water-quality requirements, and obtain a CWS Service Provider Letter through the city permit process.
Tualatin, OR Stormwater and Surface Water Rules
Some RestrictionsFlood Zones
Portions of Tualatin sit in the Tualatin River 100-year floodplain. Development inside a mapped flood hazard area is regulated under Chapter 70 (Floodplain District, FP) of the Tualatin Development Code (TDC). Any project within the 100-year floodplain requires a Flood Hazard Area Development (FHAD) permit, may require an elevation certificate, no-rise certification, or floodproofing certification, and must be reviewed by the City's Floodplain Manager.
Tualatin, OR Flood Zones and Floodplain Development Rules
Heavy RestrictionsLooking for Washington County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Tualatin city rules.
Environmental Rules in Washington County →