Preliminary results indicated there were no food safety issues in the milk samples tested but toxicologists and residue experts were still analysing them.
The results would be made known once they were available, probably in a few weeks.
Landfarming is the practice of spreading drilling mud on farmland.
MPI took samples from 20 farms, a mixture of landfarms and non-landfarms.
The samples were sent to Germany, Auckland, and Wellington labs and results were received by MPI on July 23.
“The results are still preliminary at this stage and until verified by the labs and analysed by MPI toxicologists and residue specialists we are not in a position to discuss the detail of them publicly.
“In the interim, we can confirm these preliminary results indicate there is no health and safety issue at the levels detected,” she said.
But Climate Justice Taranaki spokeswoman Catherine Cheung said “It’s not good enough for MPI to say there are no food safety issues.
“The public has the right to know what’s been found in the milk, if contaminants were present, and from which landfarms.
“Numerous studies have shown that some of the drilling and fracking chemicals are harmful at extremely low concentrations.
“Some can disrupt normal hormone functions crucial for healthy growth and reproduction, even at levels below detection.
“It was prudent of Fonterra to decline milk from new landfarms a year ago.
“But that is clearly not enough to safeguard human health and food safety.
“We call on Fonterra to stop taking milk from all landfarms, now. We also urge NZ Beef and Lamb and ANZCO to take heed and appropriate action,” Cheung said.
Since the regional council considered it was not responsible for animal welfare or food safety, the Food Safety Authority should step in.
“Someone must take responsibility for deciding when livestock can be put back on to landfarmed pasture and for ensuring that the current hands-off situation does not continue.
“This issue is not confined to dairy farming – beef cattle or sheep, for instance, may graze landfarmed pasture."
Fonterra and B+LNZ did not respond to inquiries.
