TOLEDO, Ohio (AP) — The rising cost of keeping Toledo's drinking water free from toxins in Lake Erie and other contaminants in the water might force the city to increase water rates again. An additional $3 million is needed on top of the $6 million already spent on chemicals to treat the water, said Ed Moore, Toledo's public utilities director. [...] another big problem this year was that large ice flows last spring churned up sediments in the Maumee River, which flows into the lake near Toledo's drinking water intake, The Blade (http://bit.ly/1OldK1O ) reported.