Centralia - Chehalis Chamber of Commerce
- They provides profiles of local business climate and community, phone directory for area services, links to some local businesses, searchable business data base.
- http://www.chamberway.com/

NorthWest Aquifer Surveying, Inc.
- Provides electroseismic technology to identify where to drill water wells. Serves the area within 150 miles of its office in Chehalis.
- http://www.findwellwater.com/