TULSA, Okla. (February 15, 2021) – Public Service Company of Oklahoma (PSO) is calling on customers to reduce energy use after receiving notice this morning of an Energy Emergency Alert Level 3 (EEA L3) from the Southwest Power Pool (SPP). In emergency situations, SPP may require utilities in the region, including PSO, to initiate a series of planned outages to prevent widespread, lengthy outages.