Full Breakdown
UK Water Companies Profit from Industrial Waste While Regulators Lag
By Drooid · · How we work
Core Event: Industrial Waste Entering Sewage Works
Water utilities in England, Wales, Scotland and Northern Ireland received more than £340 million in revenue last year by accepting industrial and commercial wastewater at their treatment facilities. The waste, supplied under “trade-effluent consents”, is routed to sewage works that are primarily equipped for biological treatment and are not designed to remove many industrial chemicals. As a result, treated effluent containing pollutants is discharged into rivers, lakes and seas, and sludge laden with contaminants is spread on farmland as fertilizer.
Scale and Environmental Risks
An investigation compiled a database of 26,000 consents, revealing that an estimated 608 billion litres of industrial wastewater entered sewage works from sources such as power stations, pharmaceutical plants, hospitals and abattoirs. The permits list chemicals including flame retardants, PFAS, solvents, pharmaceuticals, cyanide, chromium, cadmium and mercury. The volume of waste also overloads sewer networks, contributing to raw-sewage spills that have sparked community protests. United Utilities recorded the highest revenue from industrial waste (£61.6 million), while Thames Water handled the greatest volume of permitted waste (113 billion litres).
Regulatory Gaps and Industry Incentives
The trade-effluent system, created over three decades ago, operates without an independent regulator and lacks a central register. Water companies both issue and enforce the permits, leaving the Environment Agency without precise data on annual waste volumes. An Environment Agency officer highlighted landfill leachate as the greatest concern because of its toxic cocktail, and noted that company checks often stop at basic pH tests, which fail to detect many contaminants. An industry expert argued that water firms have a financial incentive to accept more toxic material than appropriate and called for a dedicated liquid-waste treatment sector rather than the current “dilute and disperse” model.
Official Responses
The Environment Agency acknowledged that the existing framework predates current concerns about substances such as PFAS and said it is working to improve contaminant management. Water UK, the trade association, emphasized that companies are legally obliged to accept trade effluent under charges set by Ofwat, and urged the government to ban particularly toxic substances and make manufacturers fund their removal. United Utilities asserted that its consent and control processes meet regulatory requirements designed to protect public health and the environment, and that tankered waste is accepted only at permitted sites. NI Water and Scottish Water described their own assessment procedures for trade-effluent applications, citing capacity, infrastructure protection and compliance with environmental standards.
Calls for Reform
Campaigners from River Action, led by Amy Fairman, argued that industrial pollution should not become a lucrative business for water companies and that polluters must be held financially responsible. The Department for Environment, Food and Rural Affairs echoed this sentiment, stating that water companies should never profit from pollution and urging the government to act on the clean-water bill to address the hidden industrial wastewater trade.