Swimmers warned of poisonous algae at newly designated Thames bathing web site | Air pollution

Swimmers are being warned to not enter the water on the first official bathing web site on the River Thames, in south-west London, due to poisonous blue-green algae within the water.

The blue-green algal blooms are uncommon in transferring water however are more likely to be attributable to the acute warmth, low river circulate, and nutrient air pollution from sewage waste.

Thames Water’s Hogsmill sewage remedy plant, in Kingston upon Thames, is located three miles upstream of the Ham bathing web site.

The algae discovery raises additional questions on plans by Thames Water to pump 75m litres of handled sewage a day into the river close to the showering spot, in a water recycling scheme that’s within the pre-application stage for a improvement consent order.

Marlene Lawrence, of the swimming group Teddington Bluetits, which efficiently utilized for the showering water designation at Ham, stated: “This is so unusual to get blue-green algae in a moving body of water. It is the first time in nearly six years of swimming here that this has happened.

“The river is very low-flowing at the moment because of the lack of rain and the high temperatures we are having. With climate change, this is likely to happen more.”

Thames Water’s recycling scheme has been opposed by the native Liberal Democrat MP, Munira Wilson, the council, and river customers. But it has been designated a strategic infrastructure venture, which suggests it may be pushed by means of over the heads of the native authority.

The £250m scheme entails abstracting 75m litres of water a day from the Thames at Teddington when the river is in low circulate at instances of drought, and changing it with the identical quantity of handled sewage from the close by Mogden sewage remedy works by way of a brand new tunnel.

The Environment Agency rejected a earlier try to develop the scheme as a result of the handled sewage would elevate the temperature of the water throughout low circulate, change the salinity of the river and adversely have an effect on fish and biodiversity.

Campaigners argue that the recycling venture will present solely 75m litres of water a day whereas placing the river underneath large environmental stress. This is a fraction of the 570m litres of water the corporate leaks each day.

Thames Water has been in breach of its allow circumstances at its Hogsmill works, which suggests it has discharged uncooked sewage in breach of the legislation.

The firm, which is £20bn in debt, had promised to improve the Hogsmill works final 12 months as a part of key environmental enhancements, however it was considered one of greater than 100 initiatives the struggling water firm has postponed, and is now unlikely till 2028. The failure to improve the infrastructure is being investigated by the regulator, Ofwat.

Lawrence stated: “What Thames Water are planning to do – abstract river water when the river is at very low flow in drought and replace it with treated effluent – will make the river temperature at least 1C higher than before and put it under extreme environmental pressure.

“The presence of this blue-green algae already shows that the river is under stress from the drought and high temperatures.”

The Environment Agency, which assessments bathing water areas in England, has put up an indication on the swimming spot to warn swimmers. It reads: “Do not enter the water. Do not let pets enter the water.”

The bathing spot, designated in May underneath the EU water framework directive, was the primary on the Thames in London.

Swimmers throughout the nation are making use of for bathing water standing in rivers in an try to encourage a cleanup and spotlight the dimensions of sewage air pollution by water corporations discharging uncooked and handled waste. Rivers are affected by a poisonous cocktail of sewage discharge, ceaselessly chemical compounds and highway and agricultural runoff.

Bathing water standing requires extra rigorous testing by the Environment Agency, which is required to watch the water for faecal indicator organisms. Water corporations have come underneath stress to chop sewage air pollution in areas designated for bathing.

A Thames Water spokesperson stated: “We would like to reassure river users that our proposed Teddington direct river abstraction project would not deteriorate water quality and would be required to meet strict environmental and water quality standards set by the Environment Agency.

“The new treated water outfall would also be located downstream of the proposed bathing water site, meaning recycled water would flow downstream over Teddington Weir into the tidal Thames.”