I was totally impressed by the health grade reports, as well as other reports in regards to the health system where I had my surgery- one of the top places nationally for joint replacement. Surgery site infection rates are easily available when searching for a joint replacement facility. Definitely ask the surgeon as well.
The week long prep of a thorough Hibiclens from head to toe and the instructions to place decontaminating antibiotic Mupirocin ointment nasally, to help prevent surgical site infections before surgery also made me feel they had my best interests.

My biggest regret of my knee replacement preparation/questions was not finding out the typical recovery measurements, and how it is followed. I had no idea about flexion and extension measurements, and what they should be at certain weeks of recovery. I ended up having to get a manipulation under anesthesia at 11 weeks post-op. It started recovery and PT all over again (minus the incision issue). Ask the surgeon how they will follow up after surgery. I really missed that mark for sure. Seems like the surgeons are most interested in getting you in the door only perhaps?