EPA approved the Commonwealth of the Northern Mariana Islands' primacy program under the SDWA. 

EPA finalized a rule that requires certain public water systems to collect national occurrence data for 29 per- and polyfluoroalkyl substances and lithium under the SDWA.

EPA completed its review of the National Primary Drinking Water Standards: Lead and Copper Rule Revisions (LCRR) and published a document that describes stakeholder comments; the Agency decided to proceed with a proposed rule that would revise certain key regulatory sections of the LCRR while allowing the rule to take effect.

EPA approved California's revised primacy program under the SDWA. 

EPA announced a proposed consent decree to address allegations that the Administrator failed to issue revisions to the Agency’s consumer confidence report regulations by a certain date as required under the SDWA; the decree establishes a deadline for issuing the revisions. 

EPA approved revisions to Nevada's state primacy program that adopted the federal Filter Backwash Recycling Rule under the SDWA. 

EPA announced that Rhode Island and Massachusetts revised their respective public water system supervision programs. 

EPA tentatively approved revisions to Arizona’s public water system supervision program.