PA Environment Digest Blog – Illegal dumping creates ideal breeding grounds for mosquitoes. Once they inhabit these dumping sites and reproduce, the spread of West Nile virus can begin. Here are a few things you should know about the problem of illegal dumping and ways that you can help. The Price of Illegal Dumping in Pennsylvania Illegal dumpsites can be found in every Pennsylvania county. According to the Keep Pennsylvania Beautiful (KPB) organization, there were 6,500 illegal dumpsites in Pennsylvania at last count. The costs associated with the cleanup of dumping sites usually falls on PA taxpayers rather than those responsible for this illegal and unnecessary activity.