I haven't been on the Passaic this week due to doing a Delaware River trip, but from the USGS charts, it looks like it is up a bit from the rain. Definetly fishable, though not "typical" levels for August fishing.
Follow the gauge height for the next few days, it should drop. Here's the link:
http://waterdata.usgs.gov/usa/nwis/uv?01389005