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EPA Limits

APES-FUKJEK

The EPA limits hexavalent chromium to 0.1 ppm in the water supply. However, most people do not understand the ppm measurement.

What is 0.1 ppm expressed as a percentage?

A

0.1%

B

0.01%

C

0.001%

D

0.0001%

E

0.00001%