(Francisco Kjolseth | The Salt Lake Tribune) Horse owner Kay Freeman has water containers filled with potable water on Sunday, Feb. 17, 2019, by Jason Hunt with Sandy City after finding out that her horses could also be affected by high levels of lead and copper in the water. The city says 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.