Phosphate dosing also cuts copper levels

Copper levels in sewage effluent are a third lower in areas where drinking water is dosed with phosphate, research shows

Copper levels in sewage effluent are a third lower in areas where drinking water is dosed with phosphate, research shows. The finding could aid compliance with the EU’s Water Framework Directive.

Phosphate is commonly added to UK drinking water to reduce the amount of toxic lead dissolved from old pipes and fittings.

But the practice also reduces copper losses, according to a study by consultants Atkins, the Environment Agency and water firms Severn Trent and United Utilities.1

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