Stormwater Utility

Maintenance and Inspection Program

The goal of the City’s Inspection Program is to protect and restore our local water resources by ensuring a high performance level from current and future stormwater systems. This effort can reduce flooding and polluted runoff from reaching our streams, rivers, wetlands and Puget Sound.

Without regular maintenance and inspection, your system can become compromised, allowing water to directly discharged into local streams without sediment and pollution control. An unmaintained system could cause flooding on your property and those around you, resulting in costly damage or loss.

See the City's Inspection and Maintenance Brochure for more details.

Stormwater Utility Rate Study

A new rate study is underway in 2022. Please check the City Council calendar for important dates.

The City Council adopted new utility rates based on needs identified in the 2016 Storm and Surface Water Management Comprehensive Plan, NPDES permit requirements, capital improvement projects and ongoing operations. The rate will increase annually by 19% between 2018-2020, and 2% in subsequent years. A new rate structure based on Equivalent Service Units will be implemented in 2019.

2017 Stormwater Utility Rates and System Development Charges 

Stormwater Rates
  % Impervious Surface Rate
Residential   $225.00 per parcel
Very Light Less than 10% $225.00 per parcel
Light 10.1% ≤ 20.0% $524.00 per acre
Moderate 20.1% ≤ 45.0% $1,086.00 per acre
Moderately Heavy 45.1% ≤ 65.0% $2,073.00 per acre
Heavy 65.1% ≤ 85.0% $2,650.00 per acre
Very Heavy 85.1% ≤ 100.0% $3,474.00 per acre


Surface Water Development Charge (21.03.050)
New residential dwelling unit or commercial building with up to 2,500 square feet of impervious coverage $2,085.00
Each additional 250 square feet of impervious coverage over 2,500 square feet $208.50
Other structures or additions of up to 250 square feet of impervious coverage requiring a building permit $208.50 + $208.50 for each additional 250 square feet
Surface Water Retention Locks $32.00 plus tax


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