Southern Water has completed its £9 million upgrade of Winchester’s Morestead Road Wastewater Treatment Works.
The company has carried out an extensive upgrade of the treatment works to improve the quality of the treated wastewater returned to the environment.
A major feature of the work was the construction of three aeration lanes which pump oxygen into the wastewater to help waste-digesting bacteria to thrive.
New pumps, tanks and treatment systems will help meet tightening Environment Agency standards and a new ferric dosing plant has also been installed to remove phosphate.
Phosphate increases the nutrient content of the water and may lead to algal blooms which can affect the balance of ecosystems. It is present in wastewater from a variety of sources including washing powders. The ferric reacts with the phosphate to create a solid material that can be easily removed in the wastewater treatment process.
Project Manager Jon Kenrick said:
“Morestead Road serves a population of more than 36,000 people in the area and this significant investment will help ensure we continue to cater for them while also meeting increasingly tough environmental standards.”
The project, which began in June 2012, was carried out by Southern Water’s supplier 4Delivery. The company will remain on site for another month or so while it carries out a number of extra improvements identified during the project.
With the UK government demanding a 50% reduction in storm overflow spills by 2029, the era of reactive management is over. Speaking in the House of Commons on 21 July 2025, then environment secretary Steve Reed said, “This Government will cut water companies’ sewage pollution in half by the end of the decade.”
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