Manx Utilities 'progressing plans' to upgrade St John's sewage works

Manx Utilities says it is progressing plans to upgrade the wastewater treatment works in St John’s.

The existing facility, built in the 1970s, is reaching the end of its operational life.

It's said a proposed upgrade will provide a modern, more reliable system, with the ability to meet more stringent water quality requirements into the future.

It admits the current site was 'designed for a different time'.

Last year Manx Radio reported on 'grey water' being discharged into a tributary of the River Neb, as highlighted by Isle of Man Friends of the Earth.

Later on, Manx Utilities said it has carried out a 'full clean' at the St John's sewage works which it said had been causing the issues.

You can find out more HERE.

A planning application for the upgraded sewage works is due to be submitted this summer, with hopes to start construction in early 2028. 

The new facility will include modern treatment units, improved pumping and screening equipment, storm storage capacity and odour control systems.

Announcing the timeline for the upgrade Manx Utilities addressed the issues highlighted by Isle of Man Friends of the Earth: "We are aware of recent public concern relating to wastewater discharges in the area.

"For the majority of the year the current works operates within its design constraints with flows and discharges routinely monitored in line with regulatory requirements. At times of heavy rainfall, the system can experience increased volumes, which is a known limitation of older infrastructure designed to manage both wastewater and surface water.

"The existing works has also historically struggled during times of very dry weather and increased loading, such as during the TT festival. 

"Short term fixes such as tankering flows and chemical dosing are being used to mitigate these issues as far as is reasonably practicable.

"While these situations are managed in accordance with existing consents, they reinforce the need to invest in a modern facility that provides improved treatment performance, resilience, and capacity for the future."

Construction is expected to take around two-and-a-half years, if approval is granted.