EPA approved revisions to Nevada's state primacy program under the SDWA that adopted regulations that effectuate the federal Radionuclides Rule.

EPA approved revisions to Arizona's state primacy program under the SDWA that adopted regulations that effectuate the federal Revised Total Coliform Rule.

EPA requested nominations of chemicals, microbes, or other substances that are not currently regulated in drinking water for possible inclusion on the Sixth Contaminant Candidate List.

EPA issued the Fifth Contaminant Candidate List under the SDWA, listing contaminants in drinking water that are currently not subject to any proposed or promulgated national primary drinking water regulations.

EPA approved revisions to Arizona's state primacy program adopting regulations that effectuate the federal Filter Backwash Recycling Rule, Ground Water Rule, and Radionuclides Rule.

EPA announced its intent to approve revisions to Georgia's public water system supervision program.