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Moulton Falls

Burnt Bridge Creek


Clean water fee

Clean water fees fund maintenance and enhancements to the county’s storm sewer system. The system is made up of 400 miles of pipe and 170,000 stormwater features that help keep pollution out of our streams and protect water quality in our community. The fees also fund activities to comply with the county’s National Pollutant Discharge Elimination System Municipal Stormwater Permit, including water quality monitoring and educating home and business owners about reducing pollution.

Your clean water fee

To view your clean water fee, go to the Property Information Center and enter your address or parcel number. Click on the Taxes tab, and look at the line for “Clean Water Program” under Tax Statement Items.


The Board of County Commissioners conducted a public hearing on July 8, 2014 to consider changing the rates for the clean water fee. Read the proposed ordinance language here. Review the video of the meeting related to clean water fee updates here.


The clean water fee is based on the amount of impervious surface, such as pavement and roofs, on a parcel. A unit equals 3,500 square feet and is charged at a base rate of $33 per year. [NOTE: These rates will be updated within 30 days of the final ordinance language being approved.

Property Annual rate
Single-family residence

- Single-family residence on 0.5 - 1 acres
- Single-family residence on 1 to 5 acres
- Single-family residence on 5 -20 acres
- Single-family residence on 20+ acres

Larger lots receive a fee reduction because they typically have more pervious surface, areas not covered by pavement, roofs and other hard surfaces, to soak up stormwater.


Multi-family residential developments $33 per unit
Includes retail stores, commercial offices, churches, hospitals, airports, public and private utilities, public and private schools, golf courses, industrial plants, railroad rights of way, government structures and other public facilities, including roads and subject to RCW 90.03.525 (such as roads and rights of way)
$33 per unit
State highways and land $9.90 per unit
- Rate set by state law

The rate structure was reviewed by a citizen’s task force and approved by the Board of Clark County Commissioners.

Payment due dates

Clean water fees are paid annually. Fees are billed on property tax statements due April 30. Fees of more than $50 can be paid in two installments, with the second payment due October 31. For more information, contact the Treasurer’s Office at (877) 778-4606.


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