Nearly 20 percent of the water fountains in Chicago parks tested positive for excess levels of lead in the water and have been shut down by the Chicago Park District.
Of the 1,891 outdoor fountains in city parks, 445 exceeded the U.S. Environmental Protection Agency’s (EPA) action level of 15 parts per billion. Another 14 of 544 indoor water fountains were contaminated as well. However, the EPA’s Lead and Copper Rule refers primarily to municipal water systems, not single source supplies. The rule requires that action be taken if more than 10 percent of the taps tested exceed the 15 parts per billion standard.
The U.S. Food and Drug Administration (FDA) regulates bottled water, and has set a standard of 5 parts per billion. The difference is designed to account for the fact that bottled water does not flow through lead pipes. In cases where it is sourced from municipal water supplies, it must be run through one of several filtration processes in order to be labeled as “purified.” If the Chicago Park District used the FDA standard, an additional 250 fountains would have to be shut down.