Measuring EM Waves for Home/Office Safety?

Q-Neb writes "I'm beginning to get freaked out by the degree of electromagnetic waves I know are floating through me at all times. I work in the computing hub of a small college, surrounded by wires, a wireless AirConnect LAN, and about 500 students constantly gabbing on their cell-phones. As of this weekend, our office has become overrun by ants, apparently attracted by the high microwave presence (and leftover Coke)... How can I measure the amount of airborne communication passing through my workplace or my home? (Am I just paranoid, or is 3Com really out to get me?)"