Overview

• Ofwat's investigation now covers all wastewater companies in England and Wales, aiming to address illegal sewage spills.
• The regulator has issued enforcement notices to the last four companies, demanding evidence of compliance with environmental regulations.
• Previous investigations into seven other companies have led to fines exceeding £300 million for breaches of legal obligations.
• The Environment Agency is conducting a parallel criminal investigation into widespread illegal sewage discharges.
• Water companies have faced criticism for frequent sewage spills and recent water bill increases, with campaigners arguing customers should not bear the cost of infrastructure failures.