Updated Oct 20, 2026

Williams Tank Lines LLC

As of Oct 20, 2026, Williams Tank Lines LLC in Stockton, California reports 336 power units and 347 drivers on its MCS-150, FMCSA safety rating: satisfactory.

1477 Tillie Lewis Dr, Stockton, California 95206 (209) 944-5613

Verified Oct 20, 2026 against FMCSA Company Census File (data.transportation.gov)

Williams Tank Lines LLC (USDOT 229047, MC-197435), doing business as Williams Tank Lines, is an active motor carrier based in Stockton, California that FMCSA's census classifies as for-hire and that declares hazardous materials on its MCS-150. Operation: interstate. Operating authority: active for-hire authority (MC). Fleet: 336 power units and 347 drivers (258 with CDLs). Power units count straight trucks as well as tractors, so they can exceed the tractor count. It reported 13,000,000 miles in 2024. Cargo classes declared: liquids / gases, other cargo (other: Petroleum Products). FMCSA safety rating: satisfactory, from a compliance review on May 19, 2014, 12 years ago; it reflects that review, not current performance. Registration (MCS-150) last updated April 1, 2025.

Key facts

Fleet size	100–499 power units source
FMCSA safety rating	Satisfactory source
Rating age	Rating over 10 years old source
Registration update overdue	No source
Operation	Interstate source
Cargo classes (MCS-150)	Liquids / gases, Other cargo source
Driver count	100–499 drivers source
Last MCS-150 update	Apr 1, 2025 source
Doing business as	Williams Tank Lines source
USDOT number	229047 source
MC docket	MC-197435 source
Operating authority	Active for-hire authority (MC) source
Other cargo (as described)	Petroleum Products source
Power units	336 source
Tractors (owned or leased)	46 source
Drivers	347 source
CDL drivers	258 source
Annual miles (MCS-150)	13,000,000 miles source
Mileage year	2024 source
Also hauls its own freight	No source
Safety rating date	May 19, 2014 source
USDOT registered since	Feb 22, 1983 source
Business type	Corporation source

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USDOT number: The registration number every interstate (and many intrastate) commercial carrier holds.

MCS-150: The registration form carriers file with FMCSA and must update at least every two years; fleet, drivers, cargo and the hazmat flag on this site come from it, as the carrier declared them.

Safety rating: FMCSA's result after an on-site compliance review: Satisfactory, Conditional or Unsatisfactory. A rating is not refreshed unless FMCSA reviews the carrier again, so many are years old; each profile gives the review date. Most carriers have never been reviewed and are not rated; that is not a bad mark.

Power units: Trucks and tractors that pull or carry freight.

Cargo classes: Self-declared on the MCS-150 from FMCSA's fixed list. Some carriers tick most of the list, so a long list means 'declared', not 'specialises in'; the hazmat flag does not say which hazardous materials.

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Something wrong or out of date? Suggest a correction. Source record ID 229047.