receives a copy of the comments by August 23, 2024.EPA Announces Results Of Fourth Review Of Existing Drinking Water Standards: The Safe Drinking Water Act (SDWA) requires EPA to conduct a review every six years of existing national primary drinking water regulations (NPDWR) and determine which, if any, are appropriate for revision. The purpose of the Six-Year Review is to evaluate available information for regulated contaminants to determine if any new information on health effects, treatment technologies, analytical methods, occurrence, exposure, implementation, and/or other factors provides a basis to support a regulatory revision that would improve or strengthen public health protection. EPA announced on July 23, 2024, that while it “has recently completed several significant revisions to existing regulations and other regulatory revisions are currently underway, based on this periodic review of all NPDWRs, there are no additional candidates for regulatory revision at this time.” 89 Fed. Reg. 59623.EPA Publishes Supplemental NPRM For Other Solid Waste Incineration Units Source Category: On July 25, 2024, EPA published a supplemental notice of proposed rulemaking (NPRM) regarding the proposed amendments to the new source performance standards (NSPS) and emission guidelines (EG) for the Other Solid Waste Incineration (OSWI) units source category published in the Federal Register on August 31, 2020. 89 Fed. Reg. 60342. In that action, EPA proposed changes to OSWI subcategories and related MACT floor redeterminations, applicability-related changes, and testing and monitoring flexibilities for certain small OSWI units, among other proposed changes. EPA states that based on its analysis of comments received after proposal and discussions with the state of Alaska and tribes, it proposes to add a definition for a rudimentary combustion device and asks for specific comment on this definition. EPA also proposes to postpone developing standards for such devices. Comments are due September