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.