What is a key factor influencing the uncertainty of radon measurement results?

The uncertainty of radon measurement results is significantly influenced by statistical variations and seasonal changes. These factors can cause fluctuations in radon levels due to environmental conditions and variations in house ventilation, occupancy patterns, and even weather conditions. For instance, radon levels can be higher during colder months when homes are sealed more tightly, and lower during warmer months with increased ventilation. This seasonal variability introduces uncertainty into measurements since the timing of the test can affect results.

While calibration of the measuring device, operator training, and local building codes are all important aspects of a comprehensive radon measurement strategy, they do not directly contribute to the inherent variability of radon levels in a given environment to the same extent as statistical variations and seasonal changes. Calibration ensures that devices provide accurate readings, and trained operators can conduct tests effectively, but these factors alone cannot account for the natural fluctuation in radon levels influenced by the conditions mentioned. Local building codes may dictate how radon mitigation is applied but do not influence the immediate measurement uncertainty characteristics caused by environmental factors.