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This is a rebuild of Drinking Water Watch and not yet the official record. Use the agency’s current Drinking Water Watch for anything you need to rely on.
Compliance Period Begin and End Dates
From the help published with Drinking Water Watch 3.5, reproduced as delivered.
The Compliance Period
Begin Date and the Compliance Period End Date indicate the first date
and last date of the compliance period. This
is generally the monitoring period during which either samples were not
taken or samples were taken and exceeded an MCL or treatment technique.