Regulatory Determination 3
The Safe Drinking Water Act (SDWA) directs EPA to publish a list of contaminants (referred to as the Contaminant Candidate List, or CCL) to assist in priority-setting efforts. SDWA also directs the Agency to select five or more contaminants from the current CCL and determine whether to regulate these contaminants with a National Primary Drinking Water Regulation (NPDWR).
To regulate a contaminant SDWA requires that EPA determine whether:
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The contaminant may have an adverse effect on the health of persons;
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The contaminant is known to occur or there is a substantial likelihood the contaminant will occur in public water systems with a frequency and at levels of public health concern; and
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In the sole judgment of the Administrator, regulation of the contaminant presents a meaningful opportunity for health risk reductions for persons served by public water systems.
Final Regulatory Determinations for CCL 3
On January 4, 2016, EPA announced the final determinations not to regulate four contaminants on the Third Contaminant Candidate List (CCL 3) – dimethoate, 1,3-dinitrobenzene, terbufos, and terbufos sulfone. The agency delayed the final regulatory determination on strontium to consider additional data and decide whether there is a meaningful opportunity for health risk reduction by regulating strontium in drinking water.
- Federal Register Notice: Announcement of Final Regulatory Determinations for the Third Drinking Water Contaminant Candidate List
- Other support documents for the final regulatory determinations can be found at www.regulations.gov under Docket ID EPA-HQ-OW-2012-0155
Preliminary Regulatory Determinations for CCL 3
EPA announced and requested public comment on the preliminary regulatory determinations for five CCL 3 contaminants. EPA made preliminary determinations to regulate strontium in drinking water and to not regulate four contaminants (i.e., dimethoate, 1,3-dinitrobenzene, terbufos, and terbufos sulfone).
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Technical support documents for the preliminary regulatory determinations can be found at Regulations.gov using docket ID EPA-HQ-OW-2012-0155
Public Meetings Held On Preliminary Regulatory Determinations for the CCL3
EPA hosted a public stakeholder meeting on December 9, 2014, in Washington, DC, to discuss the Agency’s Regulatory Determination 3. For more information see the slides presented.
- EPA hosted a public stakeholder meeting on June 16, 2011, in Washington, DC, to discuss the Agency’s Regulatory Determination 3. For more information see the slides presented.