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The presence of radionuclides in drinking water is an issue
addressed in the Safe
Drinking Water Act, which established a maximum contaminant
level (MCL) for both gross alpha and gross beta radiation. The MCL
for gross alpha is 15 picocuries per liter (pCi/L), while the acceptable
level for gross beta is set at 50 pCi/L.
The Las Vegas Valley's drinking water has never
exceeded those limits.
To place the health implications of radionuclides
on the human body in perspective, drinking water accounts for less
than 1 percent of the radiation to which the average person is exposed.
For more information about radiation in drinking
water, see the EPA's
information about radionuclides.
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