A peer of the House of Lords is piling the pressure on Thames Water after sewage leaked into the River Thames for the fourth time in the past month.
Lord Campbell-Savours has submitted a series of written questions to Parliament demanding answers about the 'accidental' spillages from Little Marlow Sewage Treatment Works.
"The only language these people understand is prosecution otherwise this will keep on happening," said the peer who lives in the Riverside area of Maidenhead.
The questions range from asking what volume of sewage has been dumped into the river, whether Thames Water delayed in informing the Environment Agency of any spillages and whether river users were notified.
Lord Campbell-Savours said it is his aim to make sure those responsible for the spillages are held accountable for their actions.
"I have been watching this going on for a period of months," added the retired MP.
"It should be stopped."
"It is very dangerous."
Government ministers are expected to respond to the written questions by the end of the month.
Thames Water has apologised again for the latest sewage spill on Sunday last week and has said Little Marlow Sewage Treatment Works is now a 'top priority' as it tries to fix 'technical problems'.
A statement from the water firm, which operates the sewage treatment works, said: "This is as upsetting for us as it is for the residents."
"Everything that can be done, is being done to try and put an end to these repeated problems."
Top Ten Articles
It's time to get voting as readers get their chance to decide the winner of the Independent Retailer of the Year at the inaugural Windsor and Maidenhead Business Awards.