Main > WATER > Potable Water > Disinfection > Chlorine Disinfection > Chloroform By-Prodt > Carcinogenicity > EPA > MCLG Setting > 0 (04.00)

Product USA. CE

LEGAL DISPUTES The U.S. Court of Appeals for the District of Columbia has acting on behalf of CHLORINE CHEMISTRY COUNCIL (an industry group) has found that EPA violated the Safe Drinking Water Act when it set MCLG = 0. Following seq of events
- Chloroform which EPA classifies as probable human carci
nogen; acts INDIRECTLY, triggering cancer through cell
damage & regrowth rather than by DIRECTLY interacting
with DNA
- Originally on account of above, EPA proposed a MCLG
value of 300 ppb
- In 12.98; under pressure of environmental groups; EPA
fixed a definitive MCLG value of 0
- EPA said it would stick with 0 until SAB reviewed agency
conclusions on how Cl3CH causes cancer
- The CHLORINE CHEMISTRY COUNCIL, then sued EPA,
claiming the agency ignored scientific data.
- In 03.00, SAB endorsed a risk assessment method that
will lead to Cl3CH MCLG > 0
- EPA spokeswoman said the agency plans to reevaluate
the rule in light of SAB report
UPDATE 04.00

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