Duration of spills by water companies up on previous year, in data described by environment secretary as ‘disgraceful’

Raw sewage was discharged into rivers and coastal waters in England for almost 4m hours last year, with waterways that have the highest environmental protections subjected to days of pollution.

Data released by the Environment Agency on Thursday revealed water companies discharged untreated effluent for 3.62m hours, a slight increase on last year.