Chemicals from a farm trailer spilled into Topplesfield Brook, Halstead, on June 13.
Two teams from the Environment Agency were sent out this morning to continue rescuing fish from the River Colne.
They are also monitoring the river system for signs of further environmental damage.
The farm trailer overturned above the Topplesfield Brook, spilling around 5,000 litres of pesticide directly into it.
The skies above Cambridgeshire were filled with historic planes this afternoon as the annual Flying Legends Air Show got underway.
Three of our region's police forces will now look more closely into the possibility of outsourcing civilian services to the public sector.
Families feeding the ducks and geese in Ely in Cambridgeshire could face fines of up to £2,500.