Solvay Chemicals, Longview

We regulate the water and hazardous waste activities at the Solvay chemical plant in Longview.


Facility information

This facility makes hydrogen peroxide. It currently sends (discharges) wastewater to the Nippon Dynawave pulp and paper mill for treatment and is in the process of changing the discharge through a new outfall to Longview's Consolidated Diking Improvement District No. 1 Ditch #5 and the Three Rivers Regional Wastewater treatment plant. Both Nippon and the regional wastewater treatment plant discharge to the Columbia River.

Permit information

The Southwest Clean Air Agency regulates the plant's air quality activities. Visit the Southwest Clean Air Agency website or call 360-574-3058 for more information.

Solvay contacts

Company website
Facility phone: 360-425-1114
Location: 3500 Industrial Way, Longview, Wash.