EPA approved Michigan's underground injection control Class II program for primacy.

EPA announced its intention to approve revisions to the Navajo Nation's public water system supervision program.

EPA intends to approve revisions to Arizona's public water system supervision program.

EPA proposed to approve revisions to Colorado's public water system supervision program.

EPA proposed an SDWA rule that would require public water systems to collect national occurrence data for 29 per- and polyfluoroalkyl substances and lithium to inform Agency decisions.

EPA announced its final regulatory determinations to regulate perfluorooctanesulfonic acid (PFOS) and perfluorooctanoic acid (PFOA) and to not regulate 1,1-dichloroethane, acetochlor, methyl bromide (bromomethane), metolachlor, nitrobenzene, and RDX under the SDWA.

EPA revised the National Primary Drinking Water Regulation for lead and copper under the SDWA to provide greater and more effective protection of public health by better identifying high levels of lead, improving the reliability of lead tap sampling results, strengthening corrosion control treatment requirements, expanding consumer awareness, and improving risk communication.

EPA tentatively approved revisions to Pennsylvania's public water system supervision program.

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

EPA proposed to approve New Mexico's application to revise its underground injection control program for Class I injection wells located within the state, except within Indian lands; the revisions remove the current ban on Class I injection wells and establish new permit conditions, oversight, and enforcement.