According to national reports, Chalfont St Giles’ water source is one of the six sources that may need additional treatment works during the construction of the HS2 high-speed rail link.
After environmental campaigners showed concerns over the potential contamination of drinking water supply during the construction of the high-speed rail link, the company was forced to disclose documents which provide the assessment of the risks.
The documents revealed that beside the Chalfont St Giles water supply, also the ones in Blackford and Northmoor in Hillingdon and West Hyde, Amersham, and Little Missenden in Buckinghamshire could be affected.
HS2 mentioned it was aware of the potential risks to the water supply and was putting appropriate mitigation measures in place.
The campaigners said this could result in the public receiving more heavily treated or processed water through their taps.
A spokesperson for HS2 said: “All of our ecology work is carried out in accordance with the law and is designed to minimise disturbance to wildlife. Where required, licences from Natural England ensure that we have the right safeguarding in place to protect wildlife species, professionally qualified environmental staff are on site during operations, and all works are overlooked by an ecological clerk of works.
“Ensuring the continued supply of high quality of drinking water from the chalk aquifer is an absolute priority for HS2 and we continue to work closely with Affinity Water and the Environment Agency throughout construction to ensure any risks are managed appropriately. We have always understood and acknowledged the potential risks of our work and we have spent over £100m on providing precautionary protection to public water supplies, to the satisfaction of the Environment Agency and Affinity Water.”