‘A “dirty” swimming pool led to dozens of young children contracting a stomach bug causing diarrhoea, a council said. Inspectors who visited Dolphins Swim School in York saw “brown and green” pool water, with 165 children and parents contracting giardiasis.At York Magistrates’ Court, the swim school’s owner Ryan Griffin admitted health and safety breaches.’
BBC News, 16th January 2019
Source: www.bbc.co.uk