Stormwater and Residential Pollution
One of the main pollution sources from urban and suburban communities is stormwater, which is rain and snow melt that flows over rooftops, streets, landscaping, and parking lots, picking up and carrying pollution into nearby waterways.
Stormwater is not always treated, even when it flows into street drains, and can be a leading threat to water quality.
Due to significant rain and snow across the state, Washington has become a leader in stormwater management, with local governments and businesses managing stormwater through the Stormwater Permit Program in cities and towns of a certain size.
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Author's summary: Stormwater management is crucial for water quality.