Violation code

172.602C-HMER

HM (Emergency Response) - Improper maintenance/accessibility of emergency response information.

Hazardous Materials Compliance3Non-OOS· SMS Appendix A v3.20

172.602C-HMER is a Documentation - HM violation under 49 CFR §172.602C-HMER. It falls in the Hazardous Materials Compliance BASIC with a severity weight of 3/10. Nationally it was cited 1,172 times in the last five years, with an OOS rate of 0.0%.

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National roadside inspection stats

as of 9/20/2026

Inspections

1,172

that found this code

Violations

1,172

total written

OOS rate

0.0%

0 OOS

Source: FMCSA roadside inspection data (last 5 years). The OOS rate is the share of these violations that led the officer to mark the driver or vehicle out of service.

Violation group: Documentation - HM
Regulation §: 172.602C-HMER
Severity weight: 3
Used in SMS: Yes
Status: Active
Updated: 9/20/2026

Last updated September 2026

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Notes

DSMS: Y | Comment: Added in 3.15 | Footnote: As of February 1, 2023, the violations in this table are included in SMS. Only violations cited on or after February 1 are included in SMS calculations. This update aligns SMS with how violations are being cited in a new software used for roadside inspections.

What 172.602C-HMER means — and how to avoid it

In plain English

In plain terms, 172.602C-HMER is cited for hM (Emergency Response) - Improper maintenance/accessibility of emergency response information.

What the inspector checks

•Fire extinguisher present, charged, and mounted
•Required warning devices/triangles
•Spare fuses where applicable

How to prevent it

✓Verify the extinguisher gauge is in the green and it’s secured
✓Keep a full set of triangles in the truck

How it affects your CSA

up to 9 pts (fresh)

Severity 3/10. A fresh citation counts at the 3× time weight — up to 9 points toward the Hazardous Materials Compliance BASIC — then tapers to 2× after 6 months and 1× after a year, dropping off the score at 24 months.

General guidance from the violation’s FMCSA classification — not legal advice, and not a substitute for the inspector’s findings or 49 CFR.

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Challenging 172.602C-HMER through FMCSA DataQs

If this violation was written incorrectly, here are the angles trucking-safety managers use to contest it. Playbook: Hazardous Materials.

Common ways to challenge this code

Shipment was not placardable
The materials transported did not exceed the threshold quantities requiring placards under 49 CFR Part 172 Subpart F.
Evidence that wins
- ✓Shipping papers showing UN number, hazard class, and quantity
- ✓Manufacturer's product specification sheet
Administrative HazMat code (not in SMS)
This administrative code is on the inspection report but does not contribute to CSA BASIC scoring per FMCSA SMS Methodology Appendix A.
Evidence that wins
- ✓FMCSA SMS Methodology Appendix A reference

Common pitfalls — avoid these

⚠Administrative HazMat codes still appear on the PSP record even when not scored in SMS

⚡ Draft a challenge for 172.602C-HMER →Read the DataQs guide first

More codes in Hazardous Materials Compliance

Same BASIC category — ranked by national citation volume

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Frequently asked questions about 172.602C-HMER

What does violation 172.602C-HMER mean?

172.602C-HMER is the FMCSA roadside-inspection violation code for "HM (Emergency Response) - Improper maintenance/accessibility of emergency response information.", part of the Documentation - HM group, cited under 49 CFR §172.602C-HMER.

What BASIC does 172.602C-HMER affect?

172.602C-HMER falls under the Hazardous Materials Compliance BASIC in the FMCSA Safety Measurement System (SMS).

What is the CSA severity weight of 172.602C-HMER?

172.602C-HMER carries a severity weight of 3 out of 10. Higher weights indicate violations more closely tied to crash risk, and they count more toward a carrier's Hazardous Materials Compliance score.

Is 172.602C-HMER an out-of-service (OOS) violation?

No. 172.602C-HMER is not an out-of-service violation, so on its own it does not trigger an out-of-service order at the roadside.

How many CSA points does 172.602C-HMER add to a carrier's score?

The point contribution of 172.602C-HMER depends on its severity weight (3/10) multiplied by a time weight of 3, 2, or 1 based on how recent the inspection is. You can calculate the exact contribution with the CSA points calculator.

How can a driver prevent 172.602C-HMER?

Verify the extinguisher gauge is in the green and it’s secured; Keep a full set of triangles in the truck.

Can 172.602C-HMER be challenged through DataQs?

Yes. If you believe 172.602C-HMER was recorded in error, you can file a Request for Data Review (RDR) through the FMCSA DataQs system with supporting evidence. A successful challenge can remove or correct the violation on your record.

Keep going

CSA points calculator How to challenge a violation Draft a DataQs letter for 172.602C-HMER Hazardous Materials Compliance BASIC Carrier CSA lookup CSA glossary

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