Trinity College has launched an external investigation following an issue with the water systems which left five College members receiving medical treatment.

In a statement released on 4 September, the College revealed that a mechanical failure on 12 August led to increased chlorine levels in the water supply to Wolfson Court and Blue Boar Court.

The College appointed a relevant contractor to help identify and resolve the fault.

Occupational health support has been offered to the residents and staff working in the buildings. Support is also being given to those directly and indirectly affected.

Chlorine is a chemical used to maintain water hygiene. It also mitigates against the risk of bacteria including Legionella. High rates of chlorine in water can cause medical complications including vomiting, chest pain, and some forms of cancer.

In October last year, traces of this pneumonia-causing bacteria were found in Gonville & Caius accommodation during routine testing. Students were instructed not to use hot water until the water had been treated later that day.

In accordance with regulatory requirements, Trinity College has informed the Health and Safety Executive and is reporting to the Charity Commission.

They have also stated that the external investigator will “seek to learn lessons and ensure there is no similar occurrence in the future”.

This latest water incident came a month after Cambridge Greens called on the City Council to declare a water emergency throughout the county.

They demanded “urgent action” to address pollution, flooding, and water shortages, and to mitigate any adverse effects on the local community and environment.

On 17 July, King Charles announced the Labour government’s new plans to improve regulation of the water industry after increased public concern about pollution in rivers and seas.

In line with the new bill, water company executives will be held criminally liable for violating water quality laws.