COLUMBIA — Columbia residents might have noticed some green water around the MKT Nature and Fitness Trail, but they don't need to worry. It was just Columbia Public Works testing the city's storm drain with an inert green dye. According to Public Works, the dye is not harmful to humans, pets or aquatic life.
The city tests storm drains with dye to determine whether the stormwater and sanitary sewer systems are flowing into each other. Public Works spokesman Steven Sapp said Wednesday's tests showed that no wastewater was entering the storm drain pipes.
He said that when the storm sewers are operating at maximum capacity, such as during heavy rainfall, the stormwater would enter the sewer system. Those leaks would then be fixed by lining the sanitary sewer pipes.