![]() Rain barrel information and sources for the Pacific Northwest.King County precipitation map (5.1 Mb Acrobat pdf).Stormwater glossary of terms and abbreviations.Stormwater runoff pollution and how to reduce it.Learn about the science of stormwater, common problems related to stormwater including causes and solutions, homeowner tips, regulations, and how to get help from King County. ![]() Introduction to stormwater in King County Reduce stormwater and its pollution at home Washington State is the number 1 producer of oysters, clams and mussels in the U.S.ģ2% of the certified commercial shellfish growing areas in Puget Sound, or 140,000 total acres, have been partially or completely closed due to water pollution since 1980. 27,000 gallons of stormwater runs off a 1-acre parking lotĥ0% of all salmon and steelhead runs in Puget Sound are considered unhealthy.748 gallons of stormwater runs off a 1,200 square foot roof.5 of those exceed the level that is considered safe for aquatic life.23 pesticides can be found in our streams during any given rainstorm.Stormwater Pollution Prevention Manual Learn about stormwater and how to reduce pollutionġ/3 of the pollution in Washington State's water is from stormwater runoff. 2016 King County Surface Water Design Manual
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