Business Resource Program
Welcome to the Washington Stormwater Center Business Resource Program for stormwater permittees. The purpose of this program is to aid Washington State’s business and industrial community in understanding the issues surrounding stormwater pollution and to provide assistance with stormwater NPDES permits that are administered by the Washington State Department of Ecology.
The Washington Stormwater Center Business Resource Program is proud to present to you some of our valuable partners in stormwater management. We couldn't do it without them!
Looking for Permit Assistance?
You're in the right place! Which permit do you have or think you might need?
This statewide permit applies to facilities conducting industrial activities that discharge stormwater to a surface water body or to a storm sewer system that drains to a surface water body.
Construction sites are required to be covered by a Construction Stormwater General Permit if they are engaged in clearing, grading, and excavating activities that disturb one or more acres and discharge stormwater to surface waters of the state. Smaller sites may also require coverage if they are part of a larger common plan of development that will ultimately disturb one acre or more.
This statewide permit applies to boatyards that discharge stormwater to a surface water body or to a storm sewer system that drains to a surface water body. This general permit also regulates wastewater from pressure washing in boatyards.
The permit regulates discharges of process water, stormwater, and mine dewatering water associated with sand and gravel operations, rock quarries, and similar mining operations, including stockpiles of mined materials. It also covers concrete batch operations and hot mix asphalt operations. Untreated discharge water from sand and gravel operations harms fish, aquatic life and water quality.