There is no definite answer to this question. We are estimating the flow based on what we see flowing from the well. Sometimes, the air pressure in the well can “hold back” on the flow, causing us to underestimate the production capacity. To overcome this, we can release the air pressure for a few minutes, and then reapply it after the well has built up a large volume. We then would see the volume of water that the well produced after several minutes. Then with simple math, we can calculate the production capacity.