Introduction & About Stormwater

The purpose of this guide is to assist developers, contractors, and current commercial building owners in understanding how to comply with the city’s stormwater regulations and commercial permit process. Furthermore, this guide will outline the requirements of the Spokane Regional Stormwater Manual and explain the interplay between local municipal regulations and state regulations. Lastly, this guide will summarize the construction and industrial state general permit requirements.

What is stormwater?

Stormwater is runoff during and following precipitation and snowmelt events, which includes surface runoff, and interflow. Stormwater has great potential to transport many pollutants to the aquifer and surface waters in and around the City of Spokane. The City recognizes the threat stormwater poses to the health and safety of citizens and the environment. Because of this threat the City has enacted rules and regulations governing stormwater management.