#1Rock Side Transport
Based in OH
Hazardous Waste Disposal Companies in Knox County, OH
The top-ranked hazardous waste companies serving Knox County, OH are Rock Side Transport, Ohio Water Services and Environmental Specialists Of Columbus. We list 10 hazardous waste companies serving Knox County, OH. 10 of the providers shown match an active record from U.S. EPA, checked on the date shown. Rankings follow our published methodology; sponsored placements never change rank.
Hazardous Waste Disposal Companies serving Knox County, OH. 10 providers, 10 of the top 10 verified against federal or state records. Registry records checked on 2026-11-04.
Top 10 ranked hazardous waste companies for Knox County
#2Ohio Water Services
Serves this area from Mansfield, OH (24 mi)#3Environmental Specialists Of Columbus
Serves this area from Newark, OH (25 mi)#4Environmental Specialists Of Columbus Inc
Serves this area from OH#5Clean Harbors Recycling Services Of Ohio LLC
Serves this area from OH#6Dalmation Transportation
Serves this area from OH#7Mid State Systems Inc
Serves this area from OH#8Mpw Utilities
Serves this area from OH#9Columbus & Ohio River Railroad Company
Serves this area from OH#10Bio Pro Restoration
Serves this area from Shelby, OH (36 mi)
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Frequently asked questions
How many hazardous waste companies serve Knox County?
We list 10 hazardous waste companies serving Knox County, OH: 1 based there and 9 serving it from nearby. 10 of the top 10 match an active federal or state record, checked on 2026-11-04.
Which hazardous waste companies serve Knox County?
The top-ranked hazardous waste companies serving Knox County, OH are Rock Side Transport, Ohio Water Services, Environmental Specialists Of Columbus, Environmental Specialists Of Columbus Inc and Clean Harbors Recycling Services Of Ohio LLC. The full ranked list, with the official records each provider matched, is on this page.
Which hazardous waste companies serving Knox County are verified against official records?
10 of the top 10 match an active official record: Rock Side Transport (U.S. EPA), Ohio Water Services (U.S. EPA), Environmental Specialists Of Columbus (U.S. EPA), Environmental Specialists Of Columbus Inc (U.S. EPA) and Clean Harbors Recycling Services Of Ohio LLC (U.S. EPA), and 5 more on this page. Each badge links to the official record it matched.
How are these companies ranked?
By our published methodology: verified registrations, documented capabilities, years registered and responsiveness. Sponsored placements are shown separately and never affect rank.
What does "Verified" mean on this page?
"Verified" means we matched the provider to an active official record on the date shown; each badge links to that record. The absence of a badge only means we have not verified that item.
What is the difference between a transporter and a TSDF?
A transporter moves hazardous waste under an EPA ID; a TSDF is a permitted facility that treats, stores or disposes of it. Many providers do both.
"Verified" means we matched the provider to an active official record on the date shown. The absence of a badge only means we have not verified that item. How we rank and verify. Page updated .
Communities served
Mount Vernon, Apple Valley, Fredericktown, Gambier, Centerburg, Danville, South Mount Vernon, Howard, Martinsburg, Bladensburg, Brinkhaven