Yorkshire Water has begun a £9.7m investment at Addingham sewage pumping station (SPS) and Low Mill Lane combined storm overflow (CSO) to reduce discharges into the Wharfe, as it continues its commitment to improving bathing water.
Contractor Morrisons Water Services will be constructing a 3,800m3 underground storage tank, 12.5m diameter which will hold up to 3.8 million litres of wastewater during periods of heavy rainfall, in fields off Ilkley Road.
The storage tank will hold the rainfall and wastewater flows from the combined sewer until the weather event has passed and the wastewater can be returned to the network for treatment as usual at Ilkley wastewater treatment works.
The work is part of efforts to reduce discharges from each storm overflow within 5km upstream of the bathing water in Ilkley to one discharge to the river Wharfe per bathing water season (May-September) and no more than ten discharges per year on average – ahead of the Government’s 2035 target.
Work at Addingham is expected to complete in March 2026. Further investment will take place at Bridge Lane storm overflow and Ilkley Middleton sewage pumping station in the coming months, all of which are also expected to be completed by March 2026.
Dominic Cunney, project manager at Yorkshire Water, said:
“Recent years have seen significant investment in our networks in Ilkley to improve water quality. We are now turning our attention to the storm overflows upstream of the existing bathing water. Over the next 12 months we will be investing tens of millions to reduce discharges dramatically at Addingham, Low Mill Lane, Bridge Lane and Middleton, which will help to improve water quality in the Wharfe.
“While our investment will reduce our impact on water quality in the Wharfe, it is important that other sources of pollution, such as agriculture, industry and highways drainage are investigated by the appropriate partners and their impacts on the river reduced if bathing water classifications are to be improved.”
The £9.7m investment at Addingham follows:
-
£60m upgrade to Ilkley wastewater treatment works, which is currently underway
-
A new £15m sewer under the A65 to reduce discharges to the Wharfe
-
An extension of the tunnel to reduce discharges from Rivadale storm overflow to one per year per bathing water season in 2026, alongside upgrades to Rivadale CSO
-
The addition of UV irradiation treatment at the Draughton, Grassington and Beamsley wastewater treatment works to improve water quality
-
A £1.4m investment at Ben Rhydding wastewater treatment works and Wyvil Crescent storm overflow to further reduce discharges to the Wharfe

MP’s Small Business Award winners crowned as local businesses “fight on”
Christmas timetable revealed for Skipton trains
Spanish airport operator acquires Leeds Bradford Airport in £270m deal
Amended Christmas Bus and Train services in Skipton and Craven area
Skipton RFC scores £500 kit sponsorship with local opticians
Jack and the Beanstalk panto to be performed in Skipton
Number of primary school children being expelled a 'shocking indictment on society'
Steeton Court Clinches Victory in Annual Christmas Cake Competition
Airedale NHS microbiology staff announce December strike
Patrolling street marshals return to Skipton for festive period
Glusburn Community Arts Centre to host Santa's Grotto and film screening
Skipton MP Welcomes New Law to Protect Livestock and Farmers
Route Revealed for Rudolph's Tractor Run this Sunday
Skipton charity refocuses its mission as demand for children’s mental health support surges
Airedale emergency department 'exceptionally busy' with flu cases rising
Skipton Brass Band Conductor shines on Channel 5’s All Creatures Great and Small
Local dads raise £11,892 to support Airedale Hospital and Community Charity
Yorkshire Water finally lifts five-month hosepipe ban
Don't blame wildlife for £11.7m Kex Gill overspend, say Green councillors
New school observatory opens to inspire next generation of astronomers


