City of Longmont Public Works Department Longmont, CO Contact Information 375 Airport Rd , Longmont, CO, Colorado 80503 (303) 651-8667 Location Get Directions By car By public transit Walking Bicycling Hazardous Cooking Oil 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.