Winter Roads Make Salty Streams

How might snowy and icy roads affect Baltimore area’s water supply?

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In winter, salt is regularly applied to melt ice on roads in the Northeast. But road salt runoff drains into streams and drinking water. The salt buildup has made some urban, suburban, and rural streams 25 percent as salty as seawater.

Essential Question: How might snowy and icy roads affect Baltimore area’s water supply?
Key Topics: Abiotic and Biotic Factors, Water, Runoff, Ecosystems, Graphing
Level: 7th - 12th grade
Pacing: Seven class periods
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