Frequent Questions

Are systems required to conduct Stage 1 DBPR compliance monitoring concurrent with Stage 2 DBPR IDSE monitoring?

Yes, systems regulated under the Stage 1 DBPR are required to collect their Stage 1 DBPR compliance sample(s) as well as conduct Stage 2 DBPR IDSE monitoring.

For additional guidance on the Stage 2 Disinfectants and Disinfection Byproducts rule please visit

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