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Stormwater drainage assistance

Information about stormwater drainage assistance in King County.

Report a problem

Report a flooding, drainage, or water quality problem in unincorporated King County.

City referrals for drainage concerns

Contact information for local cities and counties to report drainage and water quality problems 

Drainage facility maintenance

Resources for maintaining privately-owned stormwater facilities.

Private drainage system engineers

Private companies that perform analysis, engineering, and/or design of stormwater drainage systems. 

Private drainage maintenance contractors

Private companies that perform cleaning and maintenance services on stormwater drainage systems.