Stormwater is the number one pollution source in Puget Sound. Each year, the Puget Sound basin sees an average of more than 370 billion gallons of stormwater runoff from impervious surfaces, such as roadways and urban spaces.
The stormwater can’t penetrate these surfaces and soak into the ground; so it keeps moving and gets contaminated along the way with pollutants such as motor oil, industrial and household chemicals, and bacteria from pet waste. Approximately 30 tons of pollutants end up in the Puget Sound ecosystem every day.
The Industrial Stormwater Community of Interest (ISCOI) was formed to combat this widespread problem. Our long-term goal is to improve water quality in the Puyallup River Watershed, starting in the Tacoma Tideflats and expanding into South Tacoma/Nalley Valley.
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