Mississippi Department of Environmental Quality Jackson, MS Contact Information Jackson, MS, Mississippi 39289 (888) 786-0661 https://www.mdeq.ms.gov/ Location Get Directions By car By public transit Walking Bicycling Hazardous HHW 1 2 3 4 50.000 Does this listing contain inaccurate information? If so please send us a correction. Your name Your email Subject Please describe what corrections need to be made to the listing.