Residents in west London are taking part in a public meeting to express their views on plans for a £2.5bn "super sewer".
The Thames Tideway Tunnel will run 35km (21.7 miles) under London to prevent sewage spilling into the Thames.
Hammersmith & Fulham and Hounslow councils have arranged the meeting to allow residents to challenge whether the proposals meet their needs.
Thames Water said no decision on the location of the tunnel had been made.
The company has proposed digging a 100ft (30.4m) hole in Ravenscourt Park or Furnivall Gardens, Hammersmith, for the 32km sewer.
No decision
Construction of the tunnel would take eight years.
"We want to know whether the super-sewer is the right solution for Thames Water customers and whether this addresses residents' concerns about sewer flooding in time of heavy rainfall," a Hammersmith & Fulham council spokesperson said.
Thames Water director Richard Aylard said: "Before we make our decisions, we are determined to listen carefully to the views of all people who stand to be affected.
"We are determined where possible to do all we can to reduce the project's impact on local communities."
Representatives from Thames Water, the Environment Agency and the Consumer Council for Water will be attending the meeting to answer residents' questions.
The meeting takes place at 1900 BST at Hammersmith Town Hall in west London.
^ Back to top | BBC Sport Home | BBC Homepage | Contact us | Help | ©
~RS~q~RS~~RS~z~RS~23~RS~)