178.503 — 178.503
FMCSA violation code under Hazardous Materials. 8 events recorded in roadside inspections. Severity weight: N/A.
Severity Weight
N/A
OOS Eligible
No
BASIC Category
Hazardous Materials
Total Events
8
Code
178.503
Code System
FMCSR
BASIC Category
OOS Eligible
No
Severity Weight
N/A
Violation Group
—
Total Events
8
Carriers Cited
6
About This Violation Code
Code 178.503 falls under the Hazardous Materials BASIC category in FMCSA's Safety Measurement System (SMS).
When this violation is cited during a roadside inspection, it contributes to the carrier's Hazardous Materials BASIC score. Carriers with high BASIC percentiles may be prioritized for FMCSA interventions including warning letters, investigations, or compliance reviews.
Regulatory Reference
Federal Motor Carrier Safety Regulations
This violation references 49 CFR 178.503 in the Federal Motor Carrier Safety Regulations.
Events (all time)
8
OOS Events
1
OOS Rate
12.5%
Top State (180d)
—
Top Carriers Cited
Ranked by frequency • 6 carriers total
Top Carriers with 178.503 Violations
fmcsa-violations
| # | Carrier | USDOT | # Violations |
|---|---|---|---|
| #1 | DUPUY OXYGEN AND SUPPLY CO INC | 573832 | 3 |
| #2 | ABOUT LOGISTICS INC | 3053862 | 1 |
| #3 | LM TRANSPORTACIONES SA DE CV | 1005312 | 1 |
| #4 | BROWNE LABORATORIES INC | 1037556 | 1 |
| #5 | WATER WORKS GROUP INC | 3570414 | 1 |
| #6 | PFS NITROGEN SERVICES LLC | 537020 | 1 |
Recent Inspections
Latest inspections where 178.503 was cited • 8 total events
Recent Inspections with 178.503
Showing 6 of 8
fmcsa-inspections
Data sources & freshness
FMCSA Vehicle Inspections and Violations
Unknown freshness
Federal Motor Carrier Safety Regulations (49 CFR)
Unknown freshness