The boil advisory has been lifted. You're advised to flush your cold water lines first, run until very cold 1+ minutes. Then your fridge water dispenser at least a quart of water. Then your hot enough to flush your water heater. Don't forget to empty your ice makers and flush your outside houses also.
A boil advisory has been issued for residents of Sioux City & Dakota Dunes within the Grandview Pressure Zone.
The release says the boil advisory is in effect until March 7th, 2017 at 10:00AM for all water customers in the green zone on the map.
All water must be boiled for at least 1 minute before drinking, making ice, washing dishes, brushing teeth or using for food.
More from the city including the entire map at https://sioux-city.org/press-releases/4844-drinking-water-warning-boil-your-water-before-using