As the first step in the regulatory development process, the US Environmental Protection Agency (USEPA) is required by the Safe Drinking Water Act to publish a list of contaminants known as the Drinking Water Contaminant Candidate List (CCL) every five years. The purpose of the CCL is to provide the requisite information needed for subsequent regulatory decisions (regulatory determinations). This article briefly describes the purpose and approach of the contaminant identification research and its results.
Robertson, A., Adams, C., Bench, R., and Rosen, J.S. "Development of Recommendations for the Fourth Contaminant Candidate List." Journal of the American Water Works Association. 107 (10), pp: 76, 2015.