Styrofoam is the household name for EPS, a kind of plastic. To throw away Styrofoam, remove any recyclable pieces, then break down sheets or blocks into smaller bits you can put in your regular trash can. To recycle, make sure you have plain white Styrofoam marked with the triangular recycling symbol. Contact local agencies to see if they’ll take it. If recycling isn’t an option, reuse your Styrofoam or repurpose it for creative DIY projects.