The Puget Sound Clean Air Agency has been conducting a study of near-road pollution levels in the Chinatown/International District, centered on a new monitoring site at 10th and Weller. This graph shows the air quality of the neighborhood in April 2016. • Graph by Puget Sound Clean Air Agency

Last month’s review

This April had some warm and dry spells in the middle of the month. This resulted in six “moderate” air quality days.

The main sources of air pollution in the neighborhood are cars and trucks. Over 250,000 vehicles, including 20,000 trucks, drive by on I-5 and I-90 each day.

Air pollution can have serious impacts on human health, such as heart attacks, strokes, asthma and more.

Did you know?

May is bike everywhere month. With the nicer weather, Seattle residents take tens of thousands of more bike trips in May than April, which means less cars on the road!

Visit for a daily air quality forecast.

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Community an important part of air quality study, future dialogue

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