We provide this list of drainage system maintenance contractors for your convenience but make no recommendation regarding these companies. 

Drainage system maintenance contractors list (259 KB)

Property owners are encouraged to obtain at least 3 bids for each job, check references, and inspect the work that has been done. If you are a company who would like to be added to the list, or you need to update information on the list, please email us at stormwater@kingcounty.gov.