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Lower Marsh Lane
Sewage was released into the river twice in just four days.
The Hogsmill River was contaminated with sewage twice in one week at two points of the river.
On January 24, a storm tank in Epsom overflowed following heavy rain, spilling sewage and rainwater into the river to prevent it backing up into people’s homes and on January 27, sewage sludge from the treatment works in Kingston was released into the river after a spillage.
Storm tanks overflowing is perfectly legal; the system was built when the population of London and north Surrey was significantly lower, so the risks to wildlife were lesser. The Hogsmill is a globally rare chalk river – one of about 200 worldwide.
A spokesman for Thames Water said they were still investigating the Kingston spillage, and do not know what caused it.
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