ROCKFORD (WIFR) -- A chemical found in well water on Rockford's northwest side more than a year ago is still there.

The Illinois EPA says they're currently working with legal teams to figure out the best way to remove benzene. Last summer, the Winnebago County Health Department found water contamination in several private wells in the neighborhood east of the Cottonwood Airport. Residents were permanently hooked up to city water. But EPA spokespeople say there's still a potential hazard. They say vapor can seep into buildings. However, they would not say whether there have been any reports of that.