The apology was contained in a joint statement issued in Johannesburg by the parastatal and Earthlife Africa.
“The use of private companies to gather intelligence from stakeholders is unacceptable and not how Eskom does business,” CEO Brian Dames said in the statement.
“To the extent that this may have happened as a consequence, even if unintended, is regrettable and Eskom apologises for this.”
Tristen Taylor, representing Earthlife Africa, said Medupi contracted a company called Swartberg to find information.
Earthlife learnt of this in February. Along with Greenpeace, it cut all ties with Eskom’s non-government organisation forum until the parastatal apologised and made amends.
Taylor said the environment groups were satisfied that Eskom had met their demands.
As a result, they had rejoined the forum.
“We are quite happy with their apology,” Taylor said.