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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Monday afternoon's weather for the east of the region
Monday afternoon's weather for the west of the region
Monday's weather for the west of the region