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 is continuing to seek 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. The dates and topics of the meetings are as follows:

  • May 20, 2021: Disinfectant Residual Levels and Opportunistic Pathogens (including Legionella)
  • June 24, 2021: Regulated and Unregulated Disinfection Byproducts and Consecutive Drinking Water Systems
  • July 15, 2021: Distribution System Issues/Tools and Finished Drinking Water Storage
  • August 10, 2021: Source Water Protection Considerations and Precursor Treatment/Removal
  • September 29, 2021: Sanitary Surveys and Water Safety Plans
  • November 9, 2021 Topics TBD

All meetings are held from approximately 1:00 – 4:00 pm EST. You must register for any meeting that you wish to attend. For more information on these meetings and to find links to register please visit