Which statement is true about the Contaminant Candidate List (CCL)?

Which statement is true about the Contaminant Candidate List (CCL)?

• A. It includes contaminants not regulated by current standards
• B. It lists all contaminants already regulated
• C. It is identical to the Total Coliform Rule
• D. It focuses on secondary regulations

Answer: (A)

The Contaminant Candidate List is a tool EPA uses to identify contaminants that are not currently regulated but may need regulation in the future. It focuses on substances that could occur in drinking water and for which there is a need for more data on occurrence, health effects, and treatment options. Because it targets unregulated contaminants, it includes substances that aren’t covered by current standards. This is different from lists of regulated contaminants or from rules like the Total Coliform Rule, and it isn’t about secondary regulations. Being on the CCL signals potential future regulatory consideration, not an immediate regulation.

The Contaminant Candidate List is a tool EPA uses to identify contaminants that are not currently regulated but may need regulation in the future. It focuses on substances that could occur in drinking water and for which there is a need for more data on occurrence, health effects, and treatment options. Because it targets unregulated contaminants, it includes substances that aren’t covered by current standards. This is different from lists of regulated contaminants or from rules like the Total Coliform Rule, and it isn’t about secondary regulations. Being on the CCL signals potential future regulatory consideration, not an immediate regulation.