News Source: 
UW Today
August 31, 2011

The UW has banned it, but the stuff worms its way onto campus packed in boxes. It’s ubiquitous Styrofoam (the common name for foamed polystyrene), which has permeated the world as a low-cost, lightweight material with a wide array of uses. But the material is toxic and it never goes away.

That's why UW Recycling started a Styrofoam recycling program a year ago that is now being expanded.