Both the number of tanker oil spills recorded and the quantity of oil involved have declined in 20 years
The number as well as the total quantity of oil from accidental oil spills from tankers (including combined carriers and barges) have decreased significantly since 1992. Although the vast majority of spills are relatively small (i.e., less than seven tonnes) (ITOPF 2011), the accumulated amount is nearly one million tonnes since 1992. “Most spills from tankers result from routine operations such as loading, discharging and bunkering which normally occur in ports or at oil terminals” (ITOPF 2011).
This graphic is part of the publication Keeping Track of Our Changing Environment