The EPA is currently seeking public information and input on potential regulatory revisions of eight National Primary Drinking Water Regulations included in their Microbial and Disinfection Byproducts (MDBP) rules.

Throughout 2021, the EPA sought out input relevant to any potential rule revisions through a series of virtual public meetings focusing on specific MDBP topics identified through public comments and information. A summary of the topics that were discussed and the questions brought forth by the public can be found here: