People in parts of Nottinghamshire are being told to look after their health when cleaning up after the floods.
Council officials in Retford and Worksop said there could be low levels of contamination in the water.
Householders and workers are advised to cover cuts and open wounds, launder clothes and bedding in a hot wash and use disinfectant to clean kitchens.
Bassetlaw's principal safety officer Jim Moran said staff were working flat out to clear mud, silt and sewage.
He said: "We are assigning as many resources as we can to clean up council premises as quickly as we possibly can.
"We do recognise it's a trying time for people but the council resources are obviously limited, hence we have to rely very much on people's own input into the clear-up operation."
Meanwhile residents in parts of Nottinghamshire have been warned more floods could be on the way.
Heavy rain is forecast for the county over the next few days and, although water levels are subsiding, flood watches remain for the Trent and Idle.
Trains between Mansfield Woodhouse and Worksop have also been suspended.
Caroline Watson, from the Environment Agency in Nottingham, said the situation was being monitored very closely.
"The incident room in Nottingham is still really busy. We're responding to queries from people in Nottinghamshire and there have been a lot of people affected by the flooding.
"A lot of people are also alarmed about the flooding that might occur... but we're keeping a close eye on the rivers to make sure they're not going to rise too much further."
About 70 homes and businesses in Worksop were evacuated on Tuesday after heavy rains caused serious flooding.
The town centre was sealed off by police while fire brigade teams helped with the evacuation.
Parts of Attenborough village, south of Nottingham, were under several feet of water, with the football club and cricket ground submerged.
Clean-up operations continued in Lambley, Woodborough, Burton Joyce and Lowdham after serious flooding hit the area twice in four days.
Problems started when 40mm (1.6in) of rain fell in 24 hours, compared with the June average of 60mm for the whole month.