Yup. Lots of public safety opportunities. Start looking at the data base here at rr.com. or Scanner Master, or some other good website sources. Turn your map right side up. Burlington County is way South.
There are also lots of 144, 220, and 440 amateur radio repeaters (more than 50).
Elk gave you some good starting points from which you can gather the information you are looking for. For the database here, go to the main page and click on "Database". You can also go to http://forums.scan-nj.com/ and click on the appropriate counties. As for which ones are active, you can determine that yourself by programming them into your scanner. If you're looking for something that you don't see posted on any of the databases, feel free to ask and someone may have the information, but other than that, you can do a little bit of the leg work on your own. We're all willing to help out here, but we don't spoon feed.
There are 566 municipalities and 21 counties in New Jersey - along with multiple state systems encompassing several hundred radio networks. We have no idea where you live, what kind of listening post you have, or what you're interested in. This "Tell me everything you know about the northern two thirds of the State of New Jersey" global question indicates that you need to do begin some homework on your own, come up the learning curve, and begin to refine your interests and scope. Entire volumes have been written on this topic and will not be regurgitated here. You have 25 posts here and should be able to become proactive in this process. We're good, but not that good. Follow the instructions shown in the posts above and then begin listening to what is around you. The sources are all around you and ready for your research and knowledge acquisition.
A good way to find active freq's is to do a search mode in your scanner. Most scanners have pre-programmed service bands in them. Play around with that for a while, and write down the channels that you hear most often. Then look up the freq's on the FCC database, or here on this site, or even through various books published by myraid companies. Another way to search is to scan a particular category (aircraft, marine, railroad, public safety, news media, etc.) They fall under various bands like VHF Low, VHF Hi, UHF, 800 Mhz, 900 MHz, etc. This is another way to find active stuff around you. Again, as previous posters have stated: with such a broad general question, it's like finding a needle in a haystack.
As was said above, please do your own research. If you're still stumped on something or need clarification, then ask. Recently, there was someone in NC that has been BANNED from the RR forums for this very thing. The info you need is more than likely here. As the saying goes, we help those who help themselves.
to: Clueless in Burlington County. So far, a very global "tell me everything you know about..." appears in three separate state threads. Gotta get it together and become a participant in your own edification.