A FURTHER 900,000 tonnes of raw sewage has been dumped in the Thames only days after a smaller spill from Mogden killed more than 200 fish.
Torrential rain last Tuesday night has been blamed for the extra sewage discharge from pumping stations and treatment works along the Thames, including Mogden.
Human waste was visible on the water's surface in Brentford last week, after the spill which came only four days after the Isleworth treatment works killed hundreds of fish after dumping 20,000 tonnes of untreated sewage into the river.
A Spokeswoman from Thames Water said: "Millions of tonnes-a-year of storm sewage going into the Thames is as unacceptable to us as it is to Londoners. The discharges over the past week draw into sharp focus the need for us to significantly boost treatment capacity at Beckton, Crossness and Mogden sewage works.
"Until this essential work is done, London's sewer network - which is Victorian - and other facilities will remain overstretched. This means that after heavy rain there is simply nowhere else for excess storm sewage to go, which is why these discharges, though regrettable, are legal and consented."
Plans to expand Mogden Sewage works to increase its capacity by 40 per cent were last month approved by Hounslow Council
Laura Dowsett, environment officer for the Environment Agency said they found no further dead fish or fish in distress following the latest leak and "unfortunately storm sewerage discharges are a regular occurrence."
