Regional Water Treatment Plant

Longview's Regional Water Treatment Plant operates the water supply system that delivers high quality drinking water to more than 45,000 people in the Longview area. The primary water source is the Cowlitz River. By maintaining strict monitoring standards, Longview delivers high quality, safe, drinking water to our consumers.

The Water Treatment Facility operates 365 days a year. The City has 12 reservoirs. Our average daily water plant production is 6.5 million gallons, and our peak daily production is 15.75 million gallons.