Some federal grants never materialized after Congress failed to appropriate promised funds, she said.
Walmart and Pepsi have provided free bottled water, which residents can pick up at City Hall, LoPresto said.
The Citizen Potawatomi Nation brought a tank of water to the city Monday, Seminole County emergency manager Von Wilcots said. The tribe's headquarters is in Shawnee, about 35 miles north of Konawa.
More tanks are expected from the Oklahoma National Guard, Wilcots said.
Police in Konawa have gone door to door, handing out bottled water to the elderly, he said.
The city's school system is not been impacted because it maintains its own wells. The fire department has been cleared to fill its tanks from a Seminole County Oklahoma Gas and Electric Co. facility if needed, officials said.