25,000 gallons per month = .5 gpm. Check your tank toilets after they have set for awhile. Pull the lid and see if it's over flowing. If not check the level then flush it. If it fills higher you need a new flapper. 35 years in a water utility. That's where we find the majority of leaks.
If you...
The stock squelch settings don't do much. Have you adjusted the Service Settings in Chirp? Miklor.com has the info. +1 for the 15" whip, works well. I've got a Slim Jim coming from N9TAX. Hope to find out what it can do this weekend
The well casing has to end above grade. You can't pour concrete to the top and set that pump on it. Look at simplepump or bisonpump. You'd be better off running a generator for backup.