Yes. Any time an operational evaluation level is exceeded, the system is required to conduct an evaluation, write a report, and submit it to the state. This could happen at multiple locations or at a single location. The state can reduce the scope of the evaluation at its discretion on a case-by-case 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.