Consecutive Public Water Systems

(1) When a public water system supplies water to one or more other consecutive public water systems, the Department may, based on a written request by the consecutive system, modify the monitoring requirements in 310 CMR 22.00 otherwise applicable to the consecutive system based on the extent that the interconnection of the system justifies treating them as a single system for monitoring purposes. Any modified monitoring shall be conducted pursuant to a written schedule approved by the Department. (2) Any reduced monitoring plan approved by the Department pursuant to 310 CMR 22.12(1) will require a consecutive system to collect, at a minimum, the samples specified at 310 CMR 22.05, and monthly total coliform samples at each entry point to the distribution system.