The group Friends of the Earth has warned that the city of Wagga Wagga could be affected by Commonwealth plans to move nuclear waste from Lucas Heights to a new dump in the Northern Territory.

Representatives of the group travelled to Junee and Wagga this week to talk to local residents as well as council.

Friends of the Earth spokesman Dr Jim Green says three of the four proposed routes for the waste would impact on the city.

"There's just so much of it," he said.

"There's 2,500 cubic metres of a stockpile at Lucas Heights.

"There's things like a nuclear reactor which is going to be decommissioned at Lucas Heights and that itself will generate another 2,500 cubic metres.

"We're talking about literally hundreds and over time thousands of trucks of radioactive waste passing through these transport corridor communities."