Brightwater is a regional sewage treatment plant in south Snohomish County, Washington, United States. It serves parts of the Seattle metropolitan area and was opened in 2011. The plant construction and associated tunneling were a five-year megaproject costing $1.8 billion.[1]
- ^ Denise Whitaker (September 22, 2011). "Brightwater treatment plant set to open Saturday". Archived from the original on December 29, 2011.