Solvay Chemicals, Longview

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


Water quality

A comment period ended March 2, 2020 on proposed changes to the National Pollutant Discharge Elimination System water quality permit for Solvay Chemicals.

Read the public comment notice for more information.

Facility information

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

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.