Frequent Questions

If a system applies for a 40/30 certification and does not qualify, what monitoring schedule will the system be on?

Depending on timing, a system may be able to rejoin its original IDSE monitoring schedule. If this is not possible, the primacy agency will work with the system to develop a schedule that is appropriate.

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

Have more questions? Submit a request