"located" or drilled?
As KCM said,,,MANY factors.
I was a tender on IR T4 drilling rigs for years and there are MANY factors to even making sure WHERE you are going to drill has water.
I remember we were in East Berlin area doing a new well for a home owner and we were 100 yards from a very big lake.
Well,,, we went down over 700 feet,, in schist the whole way after 15 feet. He ended up with like 2 gallons a minute.
BUT
On the other hand we were in the diabase in York county and at 125 feet,,,in SOLID diabase,,,the fella hit over 50 GPM.
NEVER take the "first water",,, get down to solid rock and add 50 feet for a reservoir ,,,case n screen it,,drop your pump and you are gold.