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

2022 SWMP

2022 Annual Report

2021 SWMP

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:

Blackman's Lake Quality Assurance Project Plan

Private Facilities

Private Stormwater Facility Maintenance Checklist

Private Stormwater Maintenance Tips

Private Stormwater Facility Maintenance Handout

Private Stormwater Facility Maintenance Flyer