American Academy of Environmental Engineers

CH2M HILL designed and built the Cedar Water Treatment Facility to help the Seattle Public Utilities (SPU) meet strict regulatory criteria and maintain it’s standing as one of only six water districts in the country not required to filter its water.

The resulting design integrates state-of-the-art ultraviolet and ozone injection technologies into the site with minimal impact on surrounding wetland and forested areas. The new technologies mean SPU can avoid building a costly filtration plant, saving approximately $200 million.

The highly automated plant operates 24/7 with just six staff and as Seattle’s needs grow, the facility can be expanded to treat 75 mgd.

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