CITY OF HARLAN, IOWA Water Treatment Plant TONKA WATER PROJECT PROFILE Project The City of Harlan located in Shelby County, Iowa along the West Nishnabotna River, needed a new water treatment plant to replace their existing lime softening plant which had outlived its useful lifespan. To assist in the development of the right solution, Tonka Water was asked to complete a full scale pilot study on their high hardness/high TDS (Total Dissolved

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