How we collect and treat wastewater - then return it safely to the environment

Wastewater from 3 million homes and 200,000 businesses across the North West goes out of sight and out of mind every day. Our customers can flush and forget because we take care of it.

The waste is carried down drains and into our underground sewer network. There are 72,000km of sewers in our region. To put that in context, that’s more than double the distance from Manchester to Sydney, Australia.

Wastewater is transported through this network to one of our 575 wastewater treatment works. Once it’s been treated, it’s clean enough to go back into our rivers and seas – right back to the start of the water cycle!

image - Liverpool Wastewater Treatment WorksMany of these sewers were built decades ago. To make sure they continue to cope with the amount of wastewater that today’s population generates we’re continuously maintaining the sewer network and investing to improve it.

We’re also investing in our capacity to treat it. Take our ambitious project at Liverpool Wastewater Treatment Works. This will see the existing facility on the banks of the River Mersey extend into the adjacent Wellington Dock. The new £200 million extended treatment works will be capable of treating up to 11,000 litres of wastewater each second. This is not only seen as a great improvement to services to our customers, but is also key to continuing the environmental improvements to the Mersey.

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