Ofwat has proposed a total of £168 million in fines for three major English water companies—£104 million for Thames Water, £47 million for Yorkshire Water, and £17 million for Northumbrian Water—following an extensive investigation into their management of wastewater and sewer systems. These penalties stem from the companies' failure to limit discharges of untreated wastewater from storm overflows, which has harmed both the environment and customers. Ofwat noted a strong correlation between high spill levels and operational failures at wastewater treatment sites, indicating inadequate maintenance and upgrades. Chief Executive David Black emphasized the severity of these failures and the regulator's commitment to enforcing stricter compliance. He called on the companies to promptly rectify their shortcomings and improve their environmental stewardship. This investigation marks Ofwat's most significant effort to address ongoing pollution issues from wastewater treatment facilities.