Water Treatment: Microplastics

(asked on 20th November 2025) - View Source

Question to the Department for Environment, Food and Rural Affairs:

To ask His Majesty's Government what protocols are in place to monitor the environmental and public health impacts of plastic biomedia or bio-beads in wastewater treatment plants.


Answered by
Baroness Hayman of Ullock Portrait
Baroness Hayman of Ullock
Parliamentary Under-Secretary (Department for Environment, Food and Rural Affairs)
This question was answered on 4th December 2025

Bio-beads must comply with all material content regulations and standards when supplied.

The Environment Agency (EA) is working alongside the water sector on an ongoing research project, led by UK Water Industry Research (UKWIR), looking at the complex issue of the impact of microplastics generated by wastewater treatment works.

In the event of any escape of bio media from wastewater treatment works above permitted controls or that may cause significant pollution, Water Companies must immediately report this as a pollution incident to the EA, which will investigate and take necessary enforcement action. The Secretary of State for Defra has written to Water Companies to reiterate how unacceptable the pollution incident at Camber Sands is, and to stress the positive action Water Companies must take to ensure their infrastructure is functioning correctly.

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