Regional council scientists presented on river water quality, at a recent council meeting, and said the Tukituki was safe to swim in.
Mr McGregor also highlighted a video which criticised the regional council's development of Ruataniwha dam.
Those who appeared in the video included Mr McIntosh, Fish & Game biodiversity officer John Cheyne (also from Te Taiao Environment Forum), agri economist Barrier Ridler and regional council candidate Tom Belford. Their complaints included the lack of time to understand the mountain of reports on the proposal, pollution generated by increased farming activities and the cost of the project.
Mr McGregor said he wondered if Fish & Game had funded the video.
"We need to know if any funding that went into that video has been sourced from anyone with a direct stake in this election. If this is so then Fish & Game is a front for a candidate or candidates. If not, I would like to know to what extent have license holders been consulted on this," Mr McGregor said.
Fish & Game Hawke's Bay director Greg Dudley said members would discuss Mr McGregor's complaint at the organisation's next meeting.
Mr McIntosh said he did not believe Fish & Game had taken a harder line on regional councillors. "Fish & Game wants to improve water quality and improve water flows, enhance wetland habitats, we don't pay much heed to elections.
"This is the type of work the organisation has been doing for about 150 years and we've been through plenty of council elections during that time."
Mr McIntosh said he believed the role of the regional council was environmental protection of resources and habitat in Hawke's Bay. "But now we are seeing the regional council become more of an economic development agency."