Asotin County Regional Stormwater Program Inform. Educate. Prevent. Home / What You Can Do / General Household Tips / Maintaining Pools & Hot Tubs Maintaining Pools & Hot Tubs What Is Stormwater? Stormwater is rainfall and snow melt that flows over land surfaces to a storm drain system. Drains and swales transport stormwater to the … Continue reading Maintaining Pools & Hot Tubs