Gloucestershire Wildlife Trust is pursuing a licence to release beavers back into the county.
The River Deben is flowing once more after major restoration works are carried out.
One walker says he is worried after he let his dog swim in the water.
A litter picking group gathers every month to remove rubbish from the River Wear in Durham.
Misconnections happen when incorrectly installed plumbing allows waste water to be diverted to surface drains.
Testing of the River Stour in Christchurch revealed a huge jump in bacteria levels in mid-August.
An environmental group reports E. coli readings have "spiked alarmingly" in Dorset.
Canal & River Trust says the warmer climate is providing ideal conditions for fast-growing weed.
A "well-used and much-loved" walking route is to be fully restored after it was wrecked by flooding.
