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CCL-Related Links
National Contaminant Occurrence Database
Unregulated Contaminant Monitoring Program
Six Year Review of Existing Regulations
Review of the CCL Classification Process by the National Drinking Water Advisory Council
EPA has drinking water regulations for more than 90 contaminants. The Safe Drinking Water Act (SDWA) includes a process that we must follow to identify and list unregulated contaminants which may require a national drinking water regulation in the future. EPA must periodically publish this list of contaminants (called the Contaminant Candidate List or CCL) and decide whether to regulate at least five or more contaminants on the list (called Regulatory Determinations). EPA uses this list of unregulated contaminants to prioritize research and data collection efforts to help us determine whether we should regulate a specific contaminant.
In February 2005, we published the second CCL (CCL 2) contaminants. In July 2008, the Agency published a Federal Register notice announcing its final determination that no regulatory action is appropriate or necessary for 11 of the 51 CCL 2 contaminants.
In February 2008, we announced the draft third Drinking Water Contaminant Candidate List (CCL 3) and described the process and rationale used to develop the list.
The links below provide more information about Contaminant Candidate Lists and Regulatory Determinations.
- Basic Information - This page answers questions about how the CCL is developed, how it fits into the regulatory development process and links to data and information on CCL contaminants.
- CCL 3 List - This page describes the CCL 3 process and offers an opportunity to comment on the process and contaminants included on the draft CCL 3.
- CCL 2 List and Regulatory Determinations - These pages provide the contaminants listed on the second CCL and the CCL 2 Regulatory Determinations.
- CCL 1 List and Regulatory Determinations -These pages provide the contaminants listed on the first CCL and the CCL 1 Regulatory Determinations.
- Related Activities & Dates - This page includes key meetings, Federal Register Notices and dates related to the CCL.