This document provides the health effects basis to support establishing the Maximum Contaminant Level Goals (MCLG) for various chlorinated acids, aldehydes, ketones and alcohols found in chlorinated drinking water. To establish these values, data on pharmacokinetics, human exposure, acute and chronic toxicity to animals and humans, epidemiology and mechanisms of toxicity were evaluated. Specific emphasis is placed on literature data providing dose-response information. While the literature search and evaluation performed in support of this document was comprehensive, only the reports considered most pertinent in the derivation of the MCLG are cited in the document. The comprehensive literature search in support of this document includes information published up to 1991; however, more recent information may have been added during the review process.