Two days after county officials ordered the closure of all businesses serving food in Poway, nearly 200 restaurants and bars remained shuttered Monday, awaiting word from state officials that the water supply was safe and they could reopen.

Meanwhile, residents helped themselves to the 400,000 bottles of water made available by the city, and school officials tapped an outside vendor to feed the thousands of students returning from a holiday break.

City officials announced the possible contamination of Poway’s water supply on Saturday, which led to a boil-water advisory being issued Saturday night and orders from the county’s health department to close all restaurants and bars.