I don’t think they’ve done a very good job maintaining MADIS in the last couple of years either. No proof on that, but I see a lot of analysis errors when I check my site.
Some of that is going to be the EWR concrete jungle influence giving them higher readings versus surrounding towns with more vegetation. MADIS will almost always think they’re too high. I haven’t followed them enough to get a feel if they’re running higher than normal though. Put up a bunch of U90s in a row down there and EWR will be 100+ on most of those days.