The site, on the banks of the Humber Estuary at Salt End already has a big chemical processor, a power station and a sewage treatment plant.

BBC: Yorkshire and Lincolnshire: Waste disposal

While the swim might seem likely to get cut, Korff cited a 2011 fire at a sewage-treatment plant that led to millions of gallons of waste flowing into the Hudson.

WSJ: Sewage Puts Ironman Swim in Doubt

The results include a common sewage-treatment plant in Gubin, and a school in Guben where classes are taught in both German and Polish.

ECONOMIST: The German-Polish border

Other times the attacks are more personal:In 2000 a discontented consultant, rejected for a job at a water treatment plant in Australia, remotely hacked into a sewage treatment system and released 264, 000 gallons of raw sewage into rivers and parks.

FORBES: The Next Threat