The presence of these contaminants in the water does not necessarily indicate that the water poses a health risk. Last year, the DWSD tested for and did not detect Cryptosproidium in the source waters, DWSD did not test for Radon and the State of Michigan did not conduct a source water assessment for the Detroit Water and Sewerage System. Annual Monitoring at Plant Finished Water Tap Fluoride Oct. 11.0 30.0 By-Product of Drinking Water Chlorination. Total Trihalomethanes is the sum of chloroform, dichlorobromomethane, dibromochloromethane, and bromoform.
Compliance is based on the total.
New MCL effective December 16, 2001. We monitor it because it is a good indicator of the effectiveness of our filtration system. The purpose of unregulated contaminant monitoring is to assist EPA in determining the occurrence of unregulated contaminants in drinking water and whether future regulation is warranted. The MCL is set for the total or sum of these individual components. New MCLG effective December 16, 2001.