a new well to their public water system when must a revised Wellhead Protection Plan (WHPP) be submitted?
It depends on where the new well is located. If the new well is located in a separate well field, away from all the other wells, it will need a new Phase I Wellhead Protection Plan (WHPP). Ideally that plan should be submitted prior to operation of the new well, but may be submitted any time within the first year of operation. If the new well is located within an existing well field and the annual pumping rates are relatively unchanged, then no special revision is needed until the next scheduled update to the WHPP for that wellfield (in their Phase II WHPP). The same is true if the new well is located in the same wellfield but off to one side, even if it significantly increases the pumping capacity of that wellfield. A revised WHPP needs to be submitted at the time of their scheduled Phase II submittal or subsequent submittals.
