Data / Carriers / Hazardous materials carriers / Maryland
Hazardous materials carriers carriers in Maryland: 746 carriers with 5+ trucks
FMCSA lists 746 active carriers in Maryland with 5 or more power units that report hazardous materials carriers, 169 of them with 20 or more, running 18,937 power units with 17,243 drivers. Their vehicles went out of service in 19.4% of 12,727 vehicle inspections from November 7, 2024 to November 7, 2026, against 22.9% for all carriers.
SpecStream is the live web data engine for teams and agents. It reads the carrier register, roadside inspections, crashes and operating authority that FMCSA publishes, and this page is that reading. Ask for the carriers you sell to or insure by state, city, cargo or fleet size, and new inspections, crashes and authority changes arrive in your sheet, CRM, Slack or agent as FMCSA posts them.
- Carriers with 5+ power units
- 746
- With 20+ power units
- 169
- Power units
- 18,937
- Drivers
- 17,243
- Inspections
- 15,387
- Crashes involving these carriers, wherever they happened
- 547
- Vehicle out of service rate
- 19.4% (3.5 points below the national rate, national 22.9%)
Largest of these carriers in Maryland
Ranked by power units. Counts cover November 7, 2024 to November 7, 2026.
| Carrier | City | Power units | Drivers | Inspections | Vehicle out of service | Crashes |
|---|---|---|---|---|---|---|
| Cowan Systems LLC | Baltimore | 1,882 | 1,882 | 2,159 | 22.4% | 129 |
| Thompsongas LLC | Frederick | 1,210 | 787 | 624 | 6.1% | 17 |
| Baltimore Gas & Electric Co | Baltimore | 688 | 1,063 | 67 | 9.4% | 13 |
| R E Michel Company | Glen Burnie | 578 | 742 | 192 | 10.5% | 5 |
| Griffith Energy Services Inc | Columbia | 528 | 152 | 162 | 9.3% | 4 |
| D M Bowman Inc | Williamsport | 265 | 244 | 275 | 21.6% | 19 |
| Cowan Intermodal Group LLC | Baltimore | 239 | 226 | 248 | 32.1% | 12 |
| The Potomac Edison Company | Williamsport | 225 | 264 | 31 | 4.3% | 1 |
| Gray & Son Inc | Timonium | 204 | 136 | 87 | 15.9% | 0 |
| Denison Landscaping Inc | FT Washington | 175 | 105 | 9 | 0% | 0 |
| Tri-Gas & Oil Company Inc | Federalsburg | 162 | 205 | 57 | 7.4% | 4 |
| Kci Technologies Inc | Sparks | 158 | 144 | 68 | 17.5% | 2 |
| National Delivery Systems Inc | Elkridge | 147 | 136 | 164 | 16.5% | 10 |
| MTS Express LLC | Baltimore | 145 | 80 | 0 | Not listed | 0 |
| Alban Tractor LLC | Baltimore | 140 | 131 | 53 | 0% | 0 |
| Interior Specialists Inc | White Marsh | 138 | 107 | 23 | 0% | 0 |
| Keller North America Inc | Hanover | 137 | 47 | 35 | 8.3% | 0 |
| CJ Miller LLC | Hampstead | 131 | 245 | 77 | 18.6% | 5 |
| Tecta America East LLC | Jessup | 129 | 79 | 22 | 19% | 0 |
| Reliable Contracting Co Inc | Gambrills | 128 | 201 | 74 | 21.2% | 4 |
| Atlantic Tractor LLC | Salisbury | 120 | 138 | 67 | 10.8% | 1 |
| M T Laney Co Inc | Eldersburg | 108 | 124 | 57 | 19.6% | 2 |
| Total Civil Construction & Engineering | Upper Marlboro | 108 | 60 | 20 | 22.2% | 2 |
| DD&S Express Inc | Annapolis | 105 | 105 | 196 | 13.6% | 4 |
| Pillar Innovations LLC | Grantsville | 104 | 106 | 16 | 21.4% | 0 |
| Choptank Electric Cooperative | Denton | 100 | 101 | 10 | 0% | 1 |
| Solutions Transport LLC | Baltimore | 100 | 88 | 223 | 10.7% | 3 |
| Curtis Bay Energy Inc | Baltimore | 100 | 67 | 58 | 8.5% | 3 |
| Francis O Day Co Inc | Rockville | 100 | 30 | 28 | 9.5% | 4 |
| Carroll Independent Fuel LLC | Sparks Glencoe | 98 | 94 | 338 | 9.8% | 7 |
| Seh Excavating Inc | Finksburg | 96 | 101 | 64 | 13.1% | 1 |
| Dixie Land Energy LLC | Rising Sun | 96 | 77 | 81 | 25% | 6 |
| Atlantic Maintenance Group LLC | Brooklyn Park | 92 | 88 | 66 | 23.1% | 1 |
| Gec Equipment LLC | Reisterstown | 87 | 28 | 51 | 12.5% | 2 |
| A P Woodson | Capital Heights | 86 | 58 | 51 | 6% | 1 |
| David a Bramble Inc | Chestertown | 85 | 128 | 101 | 4.3% | 4 |
| Fleet Transitinc | Baltimore | 85 | 79 | 169 | 19.1% | 6 |
| Mcclung Logan Equipment Company Inc | Baltimore | 85 | 62 | 23 | 5.3% | 0 |
| Tevis Energy Inc | Westminster | 83 | 79 | 52 | 4.2% | 9 |
| Beitzel Corporation | Grantsville | 82 | 80 | 21 | 6.2% | 0 |
| A C and T Co Inc | Hagerstown | 81 | 95 | 103 | 7.8% | 4 |
| Thos Somerville Co | Upper Marlboro | 77 | 77 | 92 | 10.8% | 1 |
| Cowan Transport Services LLC | Baltimore | 77 | 65 | 78 | 28.9% | 4 |
| Pessoa Construction Company | Fairmount Heights | 77 | 55 | 22 | 31.6% | 1 |
| L B & B Associates Inc | Columbia | 76 | 101 | 189 | 14.9% | 3 |
| Ritter Transport Inc | Capital Heights | 75 | 151 | 19 | 28.6% | 2 |
| Pleasant Construction Inc | Clarksburg | 72 | 78 | 66 | 10.5% | 0 |
| Ross Contracting Inc | MT Airy | 71 | 66 | 29 | 10.7% | 1 |
| Orndorff & Spaid Inc | Beltsville | 65 | 46 | 12 | 10% | 0 |
| Town and Country Movers Inc | Gaithersburg | 64 | 72 | 72 | 23.5% | 2 |
| Kelly Generator & Equipment Inc | Owings | 63 | 49 | 32 | 16.1% | 2 |
| Maryland Tree Experts | Middle River | 61 | 46 | 254 | 63.7% | 2 |
| Highlander Contracting Company | Sparks | 60 | 60 | 8 | 25% | 1 |
| Eastern Excavating and Grading Corporation | Odenton | 59 | 16 | 16 | 20% | 2 |
| Priority Construction Corporation | Baltimore | 58 | 58 | 56 | 27.3% | 0 |
| American Paving Fabrics Inc | Hanover | 56 | 37 | 30 | 30.8% | 0 |
| Cato Inc | Salisbury | 55 | 30 | 90 | 9.1% | 4 |
| Hughes Landscaping and Supply Co Inc | Poolesville | 54 | 35 | 10 | 0% | 0 |
| Day and Sons Inc | Curtis Bay | 52 | 36 | 63 | 27.9% | 0 |
| Petroleum Recovery and Remediation Management Inc | Baltimore | 51 | 46 | 75 | 22.4% | 2 |
| Sun Ventures Contracting Inc | Jessup | 50 | 35 | 0 | Not listed | 0 |
| Wilcoxon Construction LLC | Rockville | 50 | 30 | 9 | 0% | 0 |
| Acme Paper & Supply Co | Savage | 48 | 45 | 114 | 5% | 5 |
| P Flanigan & Sons Inc | Baltimore | 46 | 112 | 14 | 9.1% | 1 |
| Global Solutions Services LLC | Beltsville | 46 | 75 | 0 | Not listed | 0 |
| M & M Welding & Fabricators Inc | MT Airy | 45 | 42 | 29 | 18.5% | 1 |
| Miller & Long Co Inc | Bethesda | 45 | 25 | 1 | Not listed | 2 |
| Accurate Insulation of Upper Marlboro LLC | Upper Marlboro | 44 | 29 | 139 | 10.6% | 1 |
| Johns Hopkins University Applied Physics Laboratory | Laurel | 43 | 34 | 7 | 0% | 1 |
| The Clark Construction Group LLC | Upper Marlborro | 42 | 50 | 14 | 12.5% | 2 |
| Ecology Services Inc | Columbia | 42 | 43 | 22 | 36.8% | 3 |
| Groff Tractor Mid Atlantic LLC | Essex | 41 | 38 | 24 | 4.5% | 1 |
| L Fishman and Son Inc | Baltimore | 41 | 37 | 90 | 9.3% | 3 |
| C & C Custom Lawncare Inc | MT Airy | 40 | 42 | 24 | 4.3% | 0 |
| M Luis Construction Company Inc | Silver Spring | 40 | 30 | 23 | 9.1% | 0 |
| Ted's Towing Service Inc | Baltimore | 40 | 29 | 61 | 14.8% | 3 |
| Bay Crane Mid-Atlantic LLC | Dundalk | 39 | 40 | 36 | 13.8% | 2 |
| Pdi Sheetz Construction Corp | Linthicum | 39 | 24 | 23 | 21.7% | 1 |
| Tilley Distribution Inc | Baltimore | 39 | 22 | 67 | 11.7% | 1 |
| Kline LLC | Frederick | 37 | 42 | 34 | 6.7% | 0 |
| Right Way Auto Transport Inc | Elkton | 37 | 37 | 28 | 10% | 2 |
| Washington Overhead Door Inc | Beltsville | 37 | 37 | 48 | 17.4% | 0 |
| Huntzberry Brothers Inc | Smithsburg | 36 | 35 | 5 | 0% | 0 |
| The Overhead Door Company of Baltimore Inc | Halethorpe | 36 | 34 | 30 | 27.6% | 0 |
| Ipr Northeast LLC a Puris Company | Beltsville | 36 | 32 | 42 | 18.5% | 0 |
| Johns Hopkins Pharmaquip Inc | Baltimore | 36 | 31 | 4 | Not listed | 0 |
| Tri-Trucking LLC | Federalsburg | 35 | 40 | 121 | 2.5% | 0 |
| Hillside Lawn Services Inc | Churchville | 35 | 34 | 21 | 20% | 1 |
| Stormwater Management Solutions LLC | Piney Point | 35 | 34 | 15 | 0% | 0 |
| Geva Transportation LLC | Clinton | 35 | 33 | 82 | 34.6% | 2 |
| Talkie Communications Inc | Chestertown | 35 | 30 | 38 | 23.7% | 0 |
| Ferreira Utec LLC | Millersville | 35 | 28 | 2 | Not listed | 0 |
| Finch Turf Inc | Eldersburg | 35 | 21 | 35 | 3.7% | 0 |
| Patuxent Roofing and Contracting LLC | Laurel | 35 | 20 | 5 | 20% | 0 |
| Leonard Paper Co | Baltimore | 33 | 39 | 39 | 16.1% | 3 |
| R D Bean Inc | Beltsville | 33 | 18 | 6 | 20% | 1 |
| Carl Belt Inc | Cumberland | 32 | 15 | 20 | 0% | 0 |
| Bridges Land Management Inc | Saint Michaels | 32 | 12 | 12 | 8.3% | 0 |
| Trend Western Technical Corp | Andrews Afb | 31 | 45 | 0 | Not listed | 0 |
| B Von Paris & Sons Inc | Savage | 31 | 37 | 27 | 4.2% | 0 |
Cities
| City | Carriers |
|---|---|
| Baltimore | 76 |
| Frederick | 27 |
| Hagerstown | 22 |
| Upper Marlboro | 21 |
| Salisbury | 18 |
| Jessup | 13 |
| Laurel | 13 |
| Gaithersburg | 13 |
| Rockville | 11 |
| Silver Spring | 10 |
| Beltsville | 10 |
| Hyattsville | 8 |
Updated November 7, 2026. Read from US Department of Transportation, FMCSA Motor Carrier Census, Inspection, Crash and Licensing files. Public domain (U.S. government work). Inspection and crash counts cover November 7, 2024 to November 7, 2026. Fleet size, drivers, cargo and operation are as each carrier reports them to FMCSA and can be out of date. A vehicle or driver out of service order means an inspector ordered the vehicle or driver off the road until the problem was fixed. The national rate comes from every inspection in the same window. Crashes are those state police reported to FMCSA and are not a finding of fault. This page uses US Department of Transportation data and is not endorsed or certified by the Department of Transportation or FMCSA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.