Ten people have been charged with fraud and money laundering offences, said the South East Regional Organised Crime Unit.
They were charged as part of Operation Knock after 34 victims were conned out of more than £300,000.
A policespokesman said: “The charges relate to incidents between October 2013 and April 2014 when victims were told their neighbours’ property had been flooded with raw sewage originating from under their property, which required specialist equipment to be hired and they needed to pay a returnable deposit.
“The offences relate to 34 victims in which over £300,000 was taken.”
Crawley was among the areas where the scams happened. There were others in Surrey, Sussex, Herfordshire, Devon and London.
Daryl Hayley, 22, of Beeches Way, Faygate; Martin Jones, 25, of Newbury Road, Crawley; Lee Farrington, 21, of Churchill Road, Lewes; Paul Bryson, 24, of Old Farm Close, Haywards Heath; Alfie Robinson, 22, of Chanctonbury Road, Burgess Hill; and Angelia Wickens, aged 30, of Parklands, Maresfield were all charged with conspiracy to conceal, disguise, convert, transfer or remove criminal property.
George Wickens, 51, of Batts Bridge Road, Maresfield and James Cavanagh, aged 24, of Parklands, Maresfield were charged with conspiracy to commit fraud by false representation and conspiracy to conceal, disguise, convert, transfer or remove criminal property.
Martin Suckling, 49, of Churchill Road, Smallfield was charged with three counts of acquiring criminal property.
Jessica Bryson, 20, of Old Farm Close, Haywards Heath was charged with two counts of acquiring criminal property.
All have been bailed to appear at Brighton Magistrates Court on March 26.
George Wickens, 23, of Iveagh Crescent, Newhaven, was charged as part of the operation on February 24.
He appeared at Brighton Magistrates Court on February 25 and was remanded in custody until April 30.