Frequent Questions

Does increased monitoring affect the entire system or only the monitoring site that exceeded the trigger value?

If a monitoring site triggers increased monitoring, the entire system must switch to increased monitoring. Increased monitoring cannot be determined on a site-by-site basis.

For additional guidance on the Stage 2 Disinfectants and Disinfection Byproducts rule please visit http://water.epa.gov/lawsregs/rulesregs/sdwa/stage2/regulations.cfm.

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