The decision to spend an extra $36.9 million on the Ruataniwha dam in the face of overwhelming public opposition, could be left up to a new council.
According to the Hawke's Bay Regional Council meeting agenda for this Wednesday, due to more information wanted by councillors on the environmental flows, a decision may not be made until November 30 - the first meeting after this year's local body elections.
Regional council chief executive Liz Lambert reports to councillors that at the June 8 meeting councillors were asked for their view on the purchase.
She said a consistent theme in the views was "a lack of clarity or certainty of the location and scale of the problems in the catchment" that such proposed flows would address.
"Clarity around the options and specific detail for the use of environmental flow water has therefore been requested to enable an informed final decision on whether or not to invest in the environmental flows to be made by November 30 2016," she said.