TL;DR
Enoch shares Cedar City's Cedar Valley aquifer, with most residential wells at 200 to 400 feet. The big planning item for new construction is timing the well and securing a transferable water right early, since Cedar Valley is a critical management area.
Summary
Building or buying in Enoch? Here is how the Cedar Valley aquifer, well depths, costs, permits, and construction timing work for one of Iron County's fastest-growing communities.