This is certainly a big concern for many in my area as well. We live in a rural area and we all have septic systems. Somehow I've had no problems but my neighbors are already pumping water from their tanks onto bare grounds behind their homes. We all have 5 +/- acre lots but it's just not a good thing and never have seen this in the 30+ years living there. We need a dry spell!
I should drive into the city and see if it's heavier. But you don't want to drive in snow in S Jersey, especially in AC, if you want to be safe. Temp is up to 36 now.