EPA tentatively approved a revision to Michigan's public water system supervision program under the SDWA by adopting the Revised Total Coliform Rule.

EPA announced its proposed approval of revisions to Montana's public water system supervision program that establish administrative penalty authority under the state's drinking water program. 

EPA entered into a proposed settlement agreement under the SDWA addressing claims regarding the Agency's obligations to develop new and revised National Primary Drinking Water Regulations. 

EPA proposed to approve Wyoming's underground injection control program revision application under the SDWA to include Class VI injection well primary implementation and enforcement authority. 

EPA announced the availability of and seeks comment on the preliminary regulatory determinations and supporting rationale for eight of the 109 contaminants listed on the fourth contaminant candidate list, determining to regulate perfluorooctanesulfonic acid and perfluorooctanic acid and to not regulate 1,1-dichloroethane, acetochlor, methyl bromide, metolachlor, nitrobenzene, and royal demolition explosive. 

EPA announced that it intends to approve revisions to Alabama’s public water system supervision program.

EPA announced its approval of and seeks comment on revisions to Missouri's public water supply supervision program. 

EPA announced that South Dakota revised its public water system supervision program by adopting federal regulations for the revised total coliform rule (RTCR) that correspond to the national primary drinking water regulations and proposed to approve South Dakota's primacy revision for the RTCR.

EPA tentatively approved revisions to Nevada's public water system supervision program under the SDWA.

EPA tentatively approved revisions to Arizona's public water system supervision program under the SDWA.