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.

EPA announced its approval of Hawaii's state primacy program revisions adopting regulations that effectuate the federal Phase II/V Chemical Contaminant Rules and the Arsenic Rule.

EPA announced its approval of seven alternative testing methods for use in measuring the levels of contaminants in drinking water to determine compliance with national primary drinking water regulations under the SDWA.

EPA approved Michigan's Class II Underground Injection Control Program for primacy under the SDWA.