0.27 microSv/h from snow in Saint Louis

They measured 0.27 microSv/h (0.027 mR/h) from the first snow in Saint Louis .

In case it contains Cs-137, it may be 746 Bq/Kg roughly calculating.

The recorder states like this below:

Typically it is difficult to measure the radioactivity of snow because its water content tends to attenuate the measurements;. However, one interesting effect we have noticed is that during active snowfalls indoor atmospheric radioactive readings tend to elevate above 2x background radiation.

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