Transportation Chemical Incidents – Week of 6-21-25

Reporting Background

See this post for explanation, with the most recent update here (removed from paywall).

Data from PHMSA’s online database of transportation related chemical incidents that have been reported to the agency.

Incidents Summary

• Number of incidents – 558 (531 highway, 24 air, 3 rail, 0 water)

• Serious incidents – 6 (4 Bulk release, 0 evacuation, 0 injury, 0 death, 2 major artery closed, 1 fire/explosion, 18 no release)

• Largest container involved – 25,750-gal DOT 111A100W5 Railcar {Hydrochloric Acid} Pressure relief device release upon hard coupling.

• Largest amount spilled – 1,280-gal FRP Trailer {Hypochlorite Solutions} Discharge to ground during unloading operation.

• Total amount reported spilled in all incidents – 3402.3-gal

NOTE: Links above are to Form 5800.1 for the described incidents.

Most Interesting Chemical: Tetramethylammonium Hydroxide Solution: Tetramethylammonium hydroxide is a solid in the hydrated form or a colorless liquid with a strong ammonia-like odor. It is soluble in water. It is corrosive to metals and tissue. (Source: CameoChemicals.NOAA.gov).