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Three Rivers Regional Wastewater Authority
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The Three Rivers Regional Wastewater Plant is a 26 MGD (million gallons per day) facility that produces biosolids from wastewater discharged into the plant from the City of Longview, City of Kelso, Beacon Hill Water Sewer District, and Cowlitz County

Biosolids from this process are available.

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Three Rivers Regional Wastewater Authority

Three Rivers Regional Wastewater Authority

Serving our Citizens

The Three Rivers Regional Wastewater Authority (TRRWA) is a municipal corporation organized pursuant to a Washington Joint Municipal Utility Services Agreement between Cowlitz County, the City of Longview, the City of Kelso, and Beacon Hill Water & Sewer District.

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