talk to your local municipality. Most boroughs will have an ordinance prevented it because they are more city like by nature, if you live in a township in a rural area you likley would not have an ordinance preventing it. I doubt you will find any state laws on the subject since you really only have a question about where is it permissible to discharge a firearm. I know plenty of people who target shoot in there back yards but of course they live on the back forty somewhere.