Petersham posts town election results directly on its website. Residents may opt out of the State’s EEE mosquito spraying by requesting an exclusion. If you are in Petersham and would like to get on the internet, the town informs the public that FREE high speed public WIFI is available in the vicinity of Town Hall – town center. Just browse for open access networks when on site. No password is needed. Petersham uses Team Up to provide a town calendar. The Petersham Police Department has its own website.