Resource provided by UW-Madison Robinson Map Library. This data layer represents 911 Public Safety Answering Point (PSAP) service area boundaries in Waukesha county, Wisconsin in 2020. According to the National Emergency Number Association (NENA), a Public Safety Answering Point (PSAP) is a facility equipped and staffed to receive 9-1-1 calls. The service area is the geographic area within which a 911 call placed using a landline is answered at the associated PSAP.