Basically, a microwave leaks around 10mw/cm2 few cm away give or take so you can make that as a reference (unhealthy). or you can measure RF few cm away your WiFi router also those values are not healthy.
Yes, these values are amazingly high as the standards setting bodies are miainly taking the industry view. eg. head of FCC in America is a telecoms lobyist appointed by Obama after giving a large donation to his political campaigning!