After years of construction, the new water filtration system in eastern Jefferson County is complete.The facility uses a riverbank filtration system. Essentially, water flows from the river through the ground into a nearly eight-thousand foot long tunnel. The rocks and sand in the tunnel wall filter the water, which is then pumped to the surface and further purified.Program Manager Kay Ball says the facility will help the Louisville Water Company meet federal water purity standards."It brings us up to the 2012 regulations and we actually will meet and exceed those regulations," she says.The Water Company is currently upgrading its Crescent Hill facility. When that work is complete, the company will be in full compliance with the new standards.To hear Ball explain how the system works, visit The Edit.