In the vegan world its standard to count every drop of rain that hit the livestock pasture as being used, therefore its fair to count the rain that ran off the factory roof where the pump was manufactured as used.
Wells don't dig themselves and although that doesn't happen often, it does take a lot of water to do it, and make the gear to do it, and get the diesel fuel out of the ground and onsite to run the drilling rig.
I drink every drop from a can/bottle, usually, but I am a bit wasteful in the kitchen sink and probably only half the tap water is swallowed. Not to mention my dishwasher uses 5 gallons or 10 gallons or whatever small number every time it cycles and washes my drinking cup (so my drinking cup's share is only maybe 1/2 cup of dishwasher cycle water, but, maybe I was only thirsty for 1/2 cup of water leading to 50% efficiency right there). And of course the dishwasher uses electricity (water) and detergent (water) and natgas to heat the water (contaminated fracking water).
I bet using the usual journalist sophistry techniques I could get your home sink up to 10:1 ratio pretty easy. Maybe not the hundreds to one ratio in the article, but close.