The water pressure inside my house went way down and stayed down after the hose was left on overnight. It's been a while now and the water pressure is still low (useable but low). The air pressure on the pump hovers between 40 and 50psi and we are served by well water. I hope there was no permanent damage done by leaving the hose on for that long. Anyone have any suggestions?
I'd guess that the recovery rate on your well is sufficient for your daily use, but not for the extended used that occured with the hose. As a result, the water level in your well has probably dropped to the point that the intake tube isn't completely submerged, so it's drawing less water. If you can reduce your water usage for a few days, it will likely recover.