Mr Farron’s 10-minute rule Bill will be heard on Tuesday and, if approved, would “require water companies to publish quarterly reports on the impact of sewage discharges on the natural environment, animal welfare and human health”, according to a copy of the document seen by The Telegraph.

It would also require all water companies to have at least one representative of an environmental group on their board to hold other members to account, and set “mandatory timescales” for the end of discharging into Britain’s waterways.

Earlier this year, The Telegraph’s Clean Rivers Campaign revealed Britain’s most polluted waterway: in Napton, on the Oxford Canal, where sewage was spilled 6,046 times over the year.

The Bill came after the Government rejected a House of Lords amendment to the Environment Bill that would have forced companies to “take all reasonable steps to ensure untreated sewage is not discharged from storm overflows” and to “demonstrate improvements in the sewerage systems”.

Ministers argued that the plan would cost too much money and lead to an increase in water bills, and accepted a more limited form of the amendment, heading off a rebellion of 22 Conservative MPs.