Watch: Are household items damaging the environment?published at 13:52 British Summer Time 8 May 2017
Paul Murphy
BBC Look North
A multimillion pound investigation by the University of Hull is hoping to establish the extent of household chemicals are harming the environment.
Mud samples from rivers are being analysed for toxins that have come from the sewage system.
They include ingredients found in toothpastes and handwash and even hormones in contraceptives.