Any organic chemical which includes chlorine atoms. A class of water pollutants. Chlorinated organic compounds, along with other halogenated organics, are believed to cause health risks such as cancer, endocrine system disruption, birth defects, compromised immune systems, and reduced fertility. Examples of chlorinated organics include trichloroethylene, ethylene dichloride, vinyl chloride, PCBs, chlorobenzene, and many chlorinated solvents and biocides.