Volume of oil spills in territorial waters in the U.S. 2000-2021, by source

* Other vessels include commercial vessels, fishing boats, freight barges, freight ships, industrial vessels, oil recovery vessels, passenger vessels, unclassified public vessels, recreational boats, research vessels, school ships, tow and tug boats, mobile offshore drilling units, offshore supply vessels, publicly owned tank and freight ships, as well as vessels not fitting any particular class (unclassified).
** All other non-vessels include aircraft, land vehicles, railroad equipment, bridges, factories, fleeting areas, industrial facilities, marinas, common carriers, sewer drainage, shipyard/repair facilities, and shorelines.
*** As of 2007, the U.S. Coast Guard no longer differentiated between offshore and onshore pipelines in data collection.

The source did not provide a release date. The date given is the date of website access.