Question

1. in the code of federal regulations reference: 40 cfr 141.62, the amounts of cadmium that are found in natural waters in the united states is small. waste discharges from the electroplating, photography, insecticide, and metallurgy industries can increase cadmium levels. the most common source of cadmium in drinking water is from galvanized pipes and fixtures. what is the mcl and mclg for cadmium?

a. 5 ppb
b. 50 ppb
c. 5 ppm
d. 50 ppm

Explanation:

The Maximum Contaminant Level Goal (MCLG) and Maximum Contaminant Level (MCL) for cadmium in drinking water, as specified in 40 CFR 141.62, are both set at 5 parts per billion (ppb). This standard protects against adverse health effects from long-term cadmium exposure.

Answer:

a. 5 ppb