Frequent Questions

How would a system that intermittently disinfects comply with the Stage 2 DBPR?

The system would monitor only during the quarter in which disinfection was provided. If the system is on yearly monitoring, it would monitor during the month of highest disinfection byproducts formation. The state should work with each system to further customize a monitoring schedule if needed.

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

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