FREDERICK, Md. —Frederick City officials say water quality has improved in Carroll Creek and the Monocacy River after 3.5 million gallons of raw sewage spilled from a waste water treatment plant last week.
Officials said Wednesday that water quality has returned to pre-spill conditions. They had previously warned against any contact with the water until water quality tests showed improvement.
City officials are now ending the emergency water tests, but county officials warn that bacterial contamination levels are constantly changing because of the constantly flowing water.
A power outage caused the spill Dec. 12 about 500 feet upstream from the Monocacy River, which supplies Frederick’s drinking water. But the city has said the drinking water supply was not affected because water is drawn upstream from the Carroll Creek spill.