Was there a Union prisoner of war camp as bad as the Confederacy's Andersonville in the Civil war?

Rock Island, loccated just outside Chicago, IL, suffered a higher Death Rate during one winter due to an epidemic. Fifteen hundred men died from exposure to the cold during the first 6 months of the camp. The Southerners were as unaccustomed to the climate and conditions of the North as the Yankees were unaccustomed to the hot, humid climate of the South.