| 1990 | 1995 | 2000 | 2004 | 2005 | 2006 | 2007 | |
|---|---|---|---|---|---|---|---|
| Highway | 7,297 | 12,869 | 15,063 | 12,977 | 13,460 | 17,151 | 16,860 |
| Accident related | 261 | 257 | 329 | 283 | 322 | 305 | 298 |
| Injuries | 311 | 296 | 164 | 156 | 179 | 192 | 155 |
| Fatalities | 8 | 7 | 16 | 10 | 24 | 6 | 10 |
| Rail | 1,279 | 1,155 | 1,058 | 753 | 745 | 704 | 745 |
| Accident related | 48 | 50 | 62 | 46 | 51 | 44 | 52 |
| Injuries | 73 | 71 | 82 | 121 | 693 | 24 | 53 |
| Fatalities | 0 | 0 | 0 | 3 | 10 | 0 | 0 |
| Air | 297 | 817 | 1,419 | 995 | 1,654 | 2,411 | 1,551 |
| Accident related | 0 | 0 | 3 | 0 | 9 | 7 | 7 |
| Injuries | 39 | 33 | 5 | 12 | 78 | 2 | 8 |
| Fatalities | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Water | 7 | 12 | 17 | 15 | 69 | 68 | 61 |
| Accident related | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Injuries | 0 | 0 | 0 | 0 | 0 | 15 | 3 |
| Fatalities | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Pipeline | |||||||
| Liquid | 180 | 188 | 146 | 144 | 139 | 117 | 114 |
| Injuries | 7 | 11 | 4 | 16 | 2 | 2 | 10 |
| Fatalities | 3 | 3 | 1 | 5 | 2 | 0 | 4 |
| Natural gas distribution | 110 | 97 | 154 | 176 | 171 | 141 | 153 |
| Injuries | 52 | 43 | 59 | 41 | 39 | 26 | 36 |
| Fatalities | 6 | 16 | 22 | 18 | 14 | 16 | 9 |
| Natural gas transmission | 89 | 64 | 80 | 123 | 181 | 146 | 132 |
| Injuries | 17 | 10 | 18 | 3 | 7 | 5 | 7 |
| Fatalities | 0 | 2 | 15 | 0 | 0 | 3 | 2 |
NOTES: Accident related excludes human errors, package failures, and unreported cases. Water data are for incidents involving packaged materials only and do not include incidents where the vessel is the container (e.g., a barge or oil tanker). Nonpipeline reporting requirements changed in 2002.
In previous years, carriers were exclusively responsible for reporting hazardous materials release incidents. In 2005, PHMSA expanded the reporting requirement to include the person in physical possession of a hazardous material at the time an incident occurs during transport. Nonrelease incidents involving cargo tanking and undeclared shipments of hazardous materials.
Pipeline data are derived from three unique data sets, and a comprehensive total for pipeline incidents is not applicable.
SOURCES: Highway, Rail, Air and Water: USDOT, Pipeline and Hazardous Materials Safety Administration (PHMSA), Hazardous Materials Information System Database, available at http://hazmat.dot.gov/pubs/inc/data/2007/2007frm.htm as of August 2008, Pipeline: USDOT, PHMSA, Office of Pipeline Safety, Pipeline Statistics, available at http://ops.dot.gov/stats/stats.htm as of July 2008.