Short-term radon test kits are not effective in measuring radon gas exposure

A new study finds the only reliable way to measure exposure to radon gas is with a long-term testing kit, 90 or more days. Researchers placed two test kits, a short term (five-day) and long term (90-day) in the same homes. Tests were conducted during summer and winter months. Findings showed the short-term kits were imprecise up to 99 percent of the time when compared to a long term test.