Stormwater

Photo of the construction of a stormwater structure.Stormwater runoff is rainfall or snow melt that flows over the ground surface. It is created when rain falls on roads, driveways, parking lots, rooftops and other paved surfaces that do not allow water to soak into the ground. As it runs off these surfaces, pollutants like heavy metals, oils, fertilizers, and pesticides are collected. If not managed correctly, these pollutants are harmful to our environment, particularly our waters such as the Spokane River or Spokane Valley-Rathdrum Prairie Aquifer.

Utility Fees & Program Development

The Stormwater Utility Program operates and maintains the city’s nearly 14,000 stormwater assets, such as drains, pipe and treatment facilities. The utility also ensures compliance with applicable stormwater management regulations created and enforced by the Washington State Department of Ecology and the U.S. Environmental Protection Agency.

The stormwater utility fee funds the following activities:

  • Inspection maintenance and operation of city stormwater facilities.
  • Service contracts for spill cleanup, traffic control, swale maintenance and landscaping, weed spraying, street sweeping, and cleaning of structures.
  • Projects to mitigate drainage problems such as erosion, roadway flooding, and citizen concerns.
  • Projects to increase stormwater capacity, protect water quality, and maintain regulatory compliance.
  • Investigation and response to unauthorized discharges to protect the aquifer and surface waters.
  • Provide education and outreach to generate awareness of water quality.
  • Meet the regulatory requirements of the Underground Injection Control (UIC) program and the Eastern Washington Phase II Municipal Stormwater Permit.

Related Documents

Rules & Regulations

The following documents provide information on stormwater regulations that apply to Spokane Valley:

Compliance Documents

The city operates two stormwater management plans (SWMPs): the Municipal Separate Storm Sewer Systems (MS4) areas regulated by the National Pollutant Discharge Elimination System (NPDES) permit and the Underground Injection Control (UIC) areas regulated under the UIC Program.

UIC regulatory documents can be found here:  coming March 2024

MS4 regulatory documents can be found here:

If you would like to comment or have questions about the city’s SWMP plans, please submit this form.