Create an Account - Increase your productivity, customize your experience, and engage in information you care about.
Show All Answers
Our fundamental drainage goal is to create and maintain drainage systems that protect against flooding, reduce pollution in storm water, and reduce damage to aquatic habitat. The major cause of most of these problems is increased storm water that comes from impervious surfaces such as rooftops, driveways, and parking lots.
Our fundamental water quality goal is to maintain and restore the County's streams and lakes. Our priorities are to decrease pollutants related to human activities, to reduce water quality problems related to flooding, to increase stream base flows, to lower water temperatures, and to increase dissolved oxygen.
In 2002, the County Council recognized the need for a detailed inventory and assessment of drainage needs throughout the county's unincorporated urban growth areas. To address a portion of these needs, the county council approved a service charge increase for properties located in the urban growth areas.
In 2008, Snohomish County completed a rate study that identified the level of additional funding that is needed to meet the new requirements of the National Pollutant Discharge Elimination System (NPDES) permit beginning in 2009. To meet these new funding requirements, the County Council amended Titles 25 and 25A to increase surface water service charges for 2009.
Some types of properties that pay service charges are:
View a map of Snohomish County Surface Water Management Districts.
Owners of single-family residences pay a flat service charge, whereas owners of apartments, businesses, and commercial structures are charged a rate per quarter acre according to the percentage of impervious surfaces* on their properties. For a complete list of rate categories and charges, see Snohomish County Code, 25.20.020 and 25A.20.020.
* Impervious surfaces are hard surfaced areas that prevent or retard the entry of water into the soil, or cause water to run off faster than under natural conditions. Common impervious surfaces include rooftops, sidewalks, pavement, patios, driveways, parking lots, gravel, and other surfaces that impede the natural infiltration or runoff of surface water.
For additional information regarding credits and exemptions, refer to the Snohomish County Code,
If you believe your service charge was miscalculated (rate category, amount of impervious surface, land use classification, acreage, or WMA), a refund may be due. Applications for billing error refunds must be made within three years of the date of payment and refunds may be retroactive up to three prior years.
Forms and inquiries should be directed to Snohomish County Surface Water. You call at 425-388-6474 or 800-562-4367 ext. 6474. You can also mail inquiries and forms to:Utility BillingSurface Water Management3000 Rockefeller Avenue M/S 607Everett, WA 98201- 4046
Note: Filing a Request for Review will not extend the payment due date.