Rural water pollution: run-off from agricultural land containing substances including pest control products, animal medicines, slurry, sewage sludge and manure
Deepwater Horizon Oil Spill: Began on April 20, 2010. Claimed 11 lives. 210 million gallons of oil. considered the largest accidental marine oil spill in the history of the petroleum industry.
The Camelford water pollution incident: accidental contamination of the drinking water supply to the town of Camelford. 20 tonnes of aluminium sulphate spilled into the water supply in July 1988.