The NPDES permit requires businesses located in unincorporated Snohomish County to implement best management practices (BMPs). The specific BMP requirements are identified in Snohomish County Drainage Manual Volume IV. These measures will help prevent discharge of pollutants to municipal storm systems, streams, rivers, lakes, and Puget Sound.
The provisions of the Snohomish County Phase I NPDES Permit require SWM staff to annually inspect 20% of business sites that have a potential to pollute stormwater. SWM personnel work with the business community to assess pollution management strategies, offer program literature, and recommend effective solutions to achieve compliance.
Depending on business type, there are a variety of ways to become compliant - from work place education and awareness to structural BMP implementation, SWM staff will provide recommendations upon conclusion of our initial visit.