sentences:  Nonetheless, the presence of chloroform in drinking water at any concentration is considered controversial by some.Historically chloroform exposure may well have been higher due to its common use as an anesthetic, as an ingredient in cough syrups, and as a constituent of tobacco smoke where p,p'-DDT had previously been used as a fumigant.It is well absorbed, metabolized, and eliminated rapidly by mammals after oral, inhalation, or dermal exposure.