Disinfection by products (DBPs) are formed when disinfectants (such as chlorine chemicals) used during water treatment to
destroy harmful bacteria and viruses, react with natural organic matter in water. Trihalomethanes (THMs) and haloacetic acids
(HAAs) are produced in the largest amounts. The level of DBPs formed after disinfection depends on the source water, type
of treatment, and amount of disinfectant used.
Health risks from exposure to low levels of DBPs are not well understood. Some studies suggest that DBP exposure may increase
the risk of bladder and colorectal cancers and reproductive and developmental health effects.
Drinking Water Disinfection By-Products, Number of Community Water Systems with MCL Violations, 1999-2007
New or more stringent MCLS for DBPs were phased in between 2003 and 2005. The MCL for total trihalomethanes was lowered from
100 micrograms per liter to 80 micrograms per liter, and a new MCL for haloacetic acids was established at 60 micrograms per
Data are presented for community water systems that reported test results for the specified time interval.There are over 600 community water systems in New Jersey.
New Jersey Department of Environmental Protection, Bureau of Safe Drinking Water;
The information provided above is from the New Jersey Department of Health's
NJSHAD Web site (http://nj.gov/health/shad). The information published
on this website may be reproduced without permission. Please use the following citation:
"Retrieved Tue, 16 September 2014 17:28:00
from New Jersey Department of Health, Center for Health Statistics,
State Health Assessment Data Web site: http://nj.gov/health/shad".