Drums of liquid and tyres were dumped in a field off the road between Rockingham and Cottingham.
About 40 tyres and several 50-gallon drums were discovered at the site.
Corby councillor Stan Heggs took up the matter and the drums have now been removed but the tyres are still lying on a verge at the side of the road.
Cllr Heggs said: “For all anybody knows the liquid inside these drums could have been toxic.
“Quite often rubbish is dumped along that stretch of road but I will continue to battle to ensure that local people can live in an environment that is clean and safe.”