Drinking-Water Guidelines - Chapter 11: Radiological ...

The health risk from ingesting radon-contaminated drinking water is considered negligible, because most of the radon escapes at the faucet or . water outlet, leaving only minimal amounts in the water itself. However, it should be noted that radon levels in drinking water, if sufficiently elevated, can significantly affect airborne radon concentrations. Their MACs are based on exposure solely ... ................
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