Frequent Questions

How should a system with fewer entry points to the distribution system than the required number of samples near an entry point complete standard monitoring?

These systems should sample at all entry points to the distribution systems and then alternate between TTHM and HAA5 sites, beginning with TTHM, to obtain the necessary number of samples.

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

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