EPA Decides Nine Unpronounceable Chemicals in Water Are Fine
Published Date: 1/15/2025
Notice
Summary
The EPA is deciding whether to regulate certain chemicals found in drinking water from their latest list. They’ve chosen not to regulate nine specific contaminants for now but want your thoughts by March 17, 2025. This affects water providers and communities, helping keep water safe without rushing costly new rules.
Analyzed Economic Effects
4 provisions identified: 0 benefits, 0 costs, 4 mixed.
EPA Says It Will Not Regulate Nine Chemicals
The EPA published preliminary decisions not to regulate nine contaminants from the Fifth Contaminant Candidate List: 2-aminotoluene, cylindrospermopsin, ethoprop, microcystins, molybdenum, permethrin, profenofos, tebuconazole and tribufos. The agency is asking for public comment on those preliminary determinations and the supporting analyses; comments are due by March 17, 2025.
No New Requirements Now for Water Systems
The EPA states that neither these preliminary regulatory determinations nor the final regulatory determinations, when published, impose any requirements on anyone. That means public water systems and other parties are not being required by this action to implement new regulatory controls as part of this notice.
EPA Continues Evaluations of Other Contaminants
The EPA is presenting updates and continuing evaluation for additional CCL 5 chemicals and some contaminants previously considered, including 1,2,3-trichloropropane, 1,4-dioxane, manganese, quinoline and strontium. Those ongoing evaluations may inform future regulatory determinations.
If EPA Later Regulates, Timelines Apply
The notice explains statutory timelines: if the EPA makes a final determination to regulate a contaminant, the agency must publish a proposed Maximum Contaminant Level Goal (MCLG) and a proposed National Primary Drinking Water Regulation (NPDWR) within 24 months, and publish a final MCLG and NPDWR within 18 months thereafter (the statute authorizes a nine-month extension).
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