Tests carried out by scientists in the Thames Valley have revealed high levels of bacteria in the flood waters that have blighted communities for more than seven weeks.
Experts at Reading University have been testing the rising waters from the Thames and the Kennet which have turned roads into rivers and damaged hundreds of homes and businesses.
As, Mel Bloor reports, the concern is now for the health of those caught up in the floods.
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A school in Hove enlisted Holly's help - to bring a lesson to life.
Holly has Wednesday's forecast for the west of the region.
Holly has Wednesday's forecast for the east of the region.