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

To ask Her Majesty's Government whether they are aware of evidence that demonstrates the adverse effects on aquatic wildlife of hormones that have entered watercourses from treated sewage.

The Environment Agency (EA) has previously carried out an extensive research programme into the feminising effects of hormones in treated sewage on wild roach populations (Rutilus rutilus) (https://www.gov.uk/government/publications/the-identification-of-oestrogenic-effects-in-wild-fish).

In the autumn of 2019 the EA will be publishing the results of research undertaken recently to investigate the current levels of feminisation in similar fish populations, as a comparison to the previous study.