I received the water bill from the owner. Here's the water gallon usage by month so far in 2022:
Jan 22,000
Feb 21,000
Mar 30,000
Apr 48,000
May 43,000
June 37,000
July 34,000
To my untrained eye, that doesn't seem like very much usage for a car wash. My apartment communities use more than that just to irrigate the landscape. I'd appreciate any insights from you.