FMCSR 177.841: Hazmat Marking Citation Q&A

No. Across our 13 million inspection records, the 177.841 citation has never resulted in an out-of-service order—the OOS rate is 0.0%. This contrasts sharply with the all-FMCSR average OOS rate of 31.4%, making this one of the safest hazmat-related citations you can receive. You will be cited, but your truck stays on the road.

177.841 carries a CSA severity weight of 5 points. This is multiplied by the number of violations within a 30-day window. A single citation = 5 points added to your BASIC 6 (Hazardous Materials) category. If you receive multiple citations for the same or related hazmat violations within 30 days, each adds 5 points, so the total scales up quickly. Track your violation date to know when the 30-day window closes.

Immediate steps:

1. Document the citation. Get a copy of the inspection report and note the specific packages cited for improper marking.
2. Inspect your hazmat marking procedures. Verify that all packages meet DOT marking requirements for their commodity class.
3. Review your hazmat placarding on the vehicle itself—peer codes like 177.817(a) (placarding violation, 2,274 citations) and 172.502(a)(1) (general placarding, 1,820 citations) often co-occur with marking violations.
4. Check your carrier's training records. Ensure hazmat handlers have current DOT certification.
5. Consider DataQs if documentation supports your case (see below).

177.841 is far less serious than most hazmat citations. Our data shows it ranks #2796 out of 3,036 FMCSR codes by citation volume. More importantly, look at peer codes: 177.834A-HMC (general loading/unloading) has a 99.2% OOS rate and 177.817(a) (placarding violation) has 75.1% OOS rate. By contrast, 177.841 has 0.0% OOS rate. The marking violation alone rarely triggers an out-of-service order, though the inspector may cite co-occurring placarding or loading defects that carry higher severity.

Yes, you can challenge it through the FMCSA's DataQs (Dispute Resolution) process. Since 177.841 involves marking on physical packages—a documentation and labeling issue—you have grounds to contest if: (1) you have proof the packages were properly marked at the time of inspection, (2) marking was damaged or obscured between loading and roadside stop, or (3) the citation misidentifies the commodity or marking requirement. File your DataQs challenge within 90 days of the inspection. Success depends on documentary evidence, not inspector judgment.

Our inspection records show only 1 all-time citation for 177.841 across all states and carriers. This extremely low enforcement volume means there is no meaningful geographic concentration. The single citation on record was issued to ROWDY PRODUCTS & SUPPLY LLC (USDOT 3289054). Given the rarity of this citation, if you receive one, inspect whether the inspector may have confused it with a more common hazmat marking code or a co-occurring violation.

Low urgency for truck recovery—0.0% OOS rate means you stay compliant to operate. However, compliance urgency is high. Our records show zero citations in the last 90 days and zero in the last 12 months, suggesting this violation is rarely cited. When it does appear, it signals a systemic labeling gap. Correct your hazmat marking procedures immediately to avoid a repeat citation, which could trigger CSA point escalation and attract inspector scrutiny on follow-up inspections.

Both. The Hazardous Materials BASIC 6 category in CSA includes violations from both drivers (unsafe transport practices) and carriers (training, maintenance, hazmat program oversight). A 177.841 citation affects the carrier's BASIC 6 score and, depending on who the inspector names responsible, may also appear on the driver's record. Review your inspection report to confirm who is cited as the violator, then coordinate with your carrier's safety manager to ensure the correction is logged as a carrier-level fix.