Incidences of reported water pollution are detailed in the following table. The incident data held on the Environment Agency's National Incident Recording System do not specify whether the pollution was to rivers or other watercourses. The following data are therefore for all pollution incidents which had an impact on water.
2004 2005 2006 2007 2008 Category 1 (major impact) 115 100 88 68 74 Category 2 (significant impact) 595 566 520 458 359 Category 3 (minor impact) 10,916 10,222 9,488 8,878 8,184 Total 11,626 10,888 10,096 9,404 8,617