Charcoalition spokesman Chris Kowal says about $48,000 has already been raised for the fighting fund and more is pledged.
Mr Kowal says funds have been coming in from across the region, with Eurobodalla and Canberra residents being particularly supportive.
He says organisations in Sydney have also financially backed the legal appeal and more substantial donations are expected.
Legal expenses have already begun to mount up, with the Charcoalition paying for initial consultations and documentation in the fight to stop Australian Silicon establishing a charcoal plant in the Eurobodalla Shire.
Meanwhile, Eurobodalla Shire Council says it is getting a strong response to its survey asking ratepayers whether they want council to financially back the legal appeal.
The survey forms have to be returned by June 14.