Drainage Rate Schedule
For 2013, drainage rates are shown below. Read the Drainage Rate Increase FAQ to learn more.
Small Residential Annual rate per parcel
|Under 3000 sq. ft.||$164.05|
|3000-4999 sq. ft.||$212.92|
|5000-6999 sq. ft.||$289.11|
|7000-9999 sq. ft.||$365.97|
All Other Properties Annual rate per 1,000 square feet
|Undeveloped (0-15% Impervious)|
|Light (16-35% Impervious)|
|Medium (36-65% Impervious)|
|Heavy (66-85% Impervious)||$70.23|
|Very Heavy (86-100% Impervious)||$83.08|
Drainage fees do not appear on your utility bill but are collected with your King County property taxes. The fee is shown on your tax bill as SWM (Surface Water Management) or Drainage. After February 15, you can view your drainage fee by entering your property tax ID in the King County Property Tax Information System.
Eligible low income customers can receive a credit. Learn more about the Payment Assistance Program.