Improving Corwen Wastewater treatment works


One of the main things we do at Welsh Water is provide you with a first-class wastewater service which will take away the wastewater you flush away or wash down the sink. That’s why we’re investing £9 million to upgrade our assets at Corwen wastewater treatment works which will in turn help improve the quality of the River Dee locally.

As a company, we depend on the environment for the water and wastewater services we provide. We take our responsibility to protecting the environment seriously and we invest around £1milllion a day improving and maintaining our networks and service to customers.

We know our customers want us to do more, especially to help protect the quality of our rivers such as the River Dee which flows next to Corwen. This is why we are working in the area to improve the way our wastewater treatment works operate.

Our wastewater treatment works in Corwen cleans and treats wastewater from nearly 2,000 homes and businesses in the Corwen area before returning the water to the River Dee. Our work at our site in Corwen will help reduce phosphorus levels in the water that we return to the environment.

There are several factors which contributes to phosphorous levels in rivers including sewer overflows, agricultural run-off and animal faeces, urban surface water drainage, misconnected drains, private septic tanks as well as how we treat wastewater before it is returned to the environment.

By investing in our site in Corwen we will be playing our part in helping to reduce the phosphorous levels in the River Dee.

Our investment

Corwen wastewater treatment works already treats waste to a high standard, but with tightened consent levels coming in, this £9 million investment will help remove phosphorus from the treated wastewater which will help to reduce the levels within the nearby Dee River – which will in turn benefit the river quality and aquatic life.

We will be improving the process on the site as well as adding additional elements to the process with more equipment and structures on site. These include additional storage tanks, settlement tanks, filters and pumps on site.

What can you expect?

All the work will be carried out within our wastewater treatment works. This work will be carried out by our contractors. Eric Wright Water along with other specialist contractors.

Work will start on site in the Autumn of 2024, and we should have everything finished by the end of Spring 2026, but we will do our best to finish as soon as we can.

At times you may notice an increase in traffic to and from the site as well as some large deliveries to the site. Our work on site will not affect water or wastewater services in the area.

Eric Wright Water will be working mostly Mondays to Fridays between 8am and 5pm, but they may need to work later and on weekends on some occasions to get the work done.

There are sometimes factors beyond our control that may delay or change the scope of the work but we’ll always minimise any potential disruption where we can.

Corwen

In Your Area

You can stay up to date with our progress on site by visiting our In Your Area page, where you can register to receive updates by email or text about Welsh Water work in your area.

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