4. Which of the following may be carcinogens (cause cancer)?
All of the above
a, b, & c
None of the above
F - Research studies have shown that bromate, haloacetic acids,
and trihalomethanes are carcinogenic in laboratory animals. This
is why the EPA regulates how much of these byproducts can be in
drinking water (80 part per billion [ppb] for trihalomethanes,
60 ppb for haloacetic acids, and 10 ppb for bromate).
Chlorite and certain types of haloacetic acids and trihalomethanes
(there are many different kinds) have been linked to some reproductive
or developmental problems in laboratory animals. Chlorite is regulated
at 1.0 parts per million (ppm).
Federal Register, Dec. 16, 1998. Part IV, 40 CFR parts 9, 141,
142. National Primary Drinking Water Regulations: Disinfectants
and Disinfection Byproducts; Final Rule. http://www.epa.gov/safewater/mdbp/dbpfr.pdf
Environmental Health Sciences Center
University of Arizona College of Pharmacy, Room 244
PO Box 210207, Tucson, AZ, USA 85721-0207 firstname.lastname@example.org