There are Northern Alta speakers known as Edimala who live in the Sierra Madre along the river valleys that flow out to the
Baler plain in
Aurora Province. The Northern Alta also reportedly live in Dibut, on the coast south of
Baler municipality, and north of Dicapanisan. Reid (1991) collected Northern Alta data from a speaker of Malabida, who was visiting in Bayanihan, an
Ilongot-speaking barangay north of
Maria Aurora, Aurora at the edge of the Sierra Madre.
Ethnologue also reports that Northern Alta is spoken in
San Luis, Aurora. Reid (1994) lists the following locations for Northern Alta. •
Baler, Aurora • Ditailin,
Maria Aurora, Aurora • Malevida, Dianawan, Maria Aurora, Aurora • Diteki,
San Luis, Aurora (listed in
Ethnologue as Diteki River in the Bayanihan area) García-Laguía (2018) collected Northern Alta data in the barangays of Diteki, Dianed, and Decoliat. García Laguía (2018) also reported that there were Alta people living in the communities of Malabida, Dimani (Barangay Villa), Dupinga, and Labi. ==Phonology==