The City of Longview’s wastewater treatment plant is designed and permitted to treat an annual average flow of 21 million gallons per day and can treat a two-hour peak flow of 63 mgd of raw sewage. In 2020, the City approved wastewater treatment plant upgrades known as the “Grace Creek Headworks” improvements.

Click here to read the case study about the plant's upgrade with the PISTA VIO grit removal system.