Water photo

Water

Stormwater is unsafe

Stormwater

Stormwater is rain and snow melt that runs off surfaces such as rooftops, paved streets, highways, and parking lots. The volume of water running off the landscape and the mass loads of pollutants that water carries can be significantly higher than natural conditions.

Polluted stormwater runoff contributes to issues with human health, degraded quality for drinking water and in streams, rivers, lakes and the Puget Sound. Low water quality in the natural environment impairs habitat and puts Washington fish and wildlife at risk. Learn more in the stormwater overview.

PERMITS

Construction Permit | Industrial Permit | Municipal Permit | Sand and Gravel Permit | Boatyard Permit

MONITORING

Stormwater Monitoring | Municipal Stormwater Monitoring | Stormwater Monitoring for Toxics

DATABASES

Water Quality Permit Databases | Environmental Monitoring Data | Regional Stormwater Monitoring Program | Environmental Information Management Stormwater Studies Data

TECHNICAL ASSISTANCE & RESOURCES

Management and Design Manuals | Municipal Permittee Resources and Guidance | Technical Resources | Stormwater Publications

LAWS & RULES

National Pollutant Discharge Elimination System (NPDES) | Water Quality Standards for Groundwater of WA—173-200 WAC | Water Quality Standards for Surface Water of WA—173-201A WAC | Water Pollution Control—90.48 RCW

car driving through runoff puddle

STORMWATER PERMITS

Construction, Industrial, and Municipal permits.

Spotlight

WATER QUALITY PERMITTING PORTAL

WQWebPortal is the one stop site for all electronic water quality permit submissions.

WASHINGTON WATERS - OURS TO PROTECT

What you can do to reduce polluted runoff.