Property owners are responsible for inspecting and maintaining the stormwater systems on their property. For many properties, the City inspects private stormwater systems every 1 to 2 years.  

Within the Private Stormwater Facility Self-Certification Program, some property owners are permitted to inspect, maintain, and certify that they have completed any needed maintenance. Eligible property owners will receive a letter from the City providing information on how they can self-certify.

To participate in the program, eligible properties need to review the King County Maintenance Requirements and complete the Self-Certification Checklist. Completed checklists can be sent to Brett Massa (bmassa@shorelinewa.gov). To remain eligible, properties must successfully self-certify when requested to by the City.

Helpful Resources:

• Interactive Map (view stormwater systems on your property)
• Stormwater Management Manual for Western Washington (additional detail for maintaining stormwater systems)
• Maintenance Contractor List
• Private Stormwater Facility Self-Certification Program: Inspection and Maintenance Basics

For questions on maintenance of your storm drain system, contact Brett Massa.  

Technical assistance with storm drain maintenance is available for small businesses through the Business Pollution Prevention Program. Contact the Surface Water Utility at (206) 801-2420 or clovelace@shorelinewa.gov to schedule a free site visit. The Business Pollution Prevention Program is funded by Department of Ecology’s Pollution Prevention Assistance program.