(Francisco Kjolseth | Tribune file photo) In this Feb. 17 file photo, cases of water are stored at the Sandy Operations Center at 9150 So. 150 East for residents to drive through and pick up. The problem started about Feb. 6, when a fluoride pump malfunctioned because of a power outage. It flooded the water system with fluoride and that also led to high levels of lead and copper, enough that it made some people sick. A new report criticizes delays in warning the public and too much concern on the part of city officials about causing a panic.