I'd recommend looking at the MADIS evaluation data.
You can usually find that using the "quality control data" link off of this page for each station:
(that one is my own station)
What you're looking for is green checkmarks meaning that station is generally in line with other stations in the area, or at least not wildly out of line.
It also tells you that the station owner reviews those settings and make adjustments to bring their reporting better in line with others.