Residents and Businesses

Drainage Inspection Program

The City has one Stormwater Inspector that inspects all of our residential and commercial facilities on a yearly basis along with spot checks by City staff.


Illicit Discharge Detection & Elimination

The Illicit Discharge Detection and Elimination (IDDE) Program is designed to detect and remove prohibited stormwater discharges pursuant to the requirements described in the Western Washington Phase II Municipal Stormwater Permit, Section S5.C.3. Both qualitative and quantitative evaluations are performed to determine whether a documented prohibited stormwater discharge must be immediately contained or not. Specific steps are then taken for containment of discharges that impact, or that have the potential to impact, the City's municipal separate stormwater system (MS4), surface water, or groundwater.

Prohibited stormwater discharge violations include all violations subject to Title 15 of King County Surface Water Design Manual.

Prohibited stormwater discharges occur for various reasons, including but not limited to: illicit discharges, illicit connections, illegal dumping, equipment malfunctions, operating accidents, fires, natural events, and vandalism. These incidents may result in contamination of private or public property that causes harm to public health, as well as natural, cultural and economic.

Staff Contact