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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.
Seasonal Start MM/DD
From the help published with Drinking Water Watch 3.5, reproduced as delivered.
Start Month/Start Day includes the calendar month and day when a public water system’s season of operation begins or the first day of the seasonal period during which samples must be collected. .