Snohomish is full of waterways and the city is both proud and dedicated to help protect them. The city is flanked by the Snohomish River to the South, the Pilchuck River to the east and Cemetery Creek to the west. Blackman’s Lake sits squarely in the middle and boasts a long history of community interest. The city is a phase II municipality and manages its own national pollutant discharge elimination system (NPDES) permit.

Stormwater Permit Information

Storm Drainage Rates

View the fee schedule

Stormwater Management Program

2020 SWMP
2019 Annual Stormwater Report
2017 SWMP
2017 Annual Stormwater Report
2018 Annual Stormwater Report
2018 SWMP
2019 SWMP
2020 Annual Stormwater Report
Construction Stormwater General Permit (2020-2025)
Industrial Stormwater General Permit (2020-2025)


Restaurant Best management Practices Poster
Mobile Pet Grooming Brochure
Youth Community Fundraising Car Wash Brochure
LID Manual
Illicit Discharge Detection & Elimination Brochure
Swifty Creek Streamside Landowner Flyer
Rain Garden Manual
Car Maintenance Brochure
Sound Salmon Solutions Link:
Snohomish Conservation Link:

Private Facilities

Private Stormwater Facility Maintenance Checklist
Private Stormwater Maintenance Tips
Private Stormwater Facility Maintenance Handout
Private Stormwater Facility Maintenance Flyer