Although the cause of the crisis was yet to be determined by the Inquiry, and court, Mr Kirton said in his opinion, the evidence was "overwhelming".
"Now the Hastings District Council can run as much as they like, they cannot hide from the evidence," he said.
It showed the council's performance on monitoring their resource consent for the bores had been "nothing short of derelict", he said.
"I invite Mr McLeod from the Hastings District Council to view the video, to look at the evidence and then tender his resignation, because that is what the inevitable conclusion is when you read that evidence."
No comment from Mr McLeod was forthcoming yesterday.
Hastings mayor Lawrence Yule however said nobody would be resigning from the council yet.
If anybody needed to resign, this would be determined by the Inquiry, he said. If it was found the council, its staff, or an organisational regime had been responsible for the contamination, then they would address culpability.
"But at this stage I'm not interested and nor do I think it's fair [for] a public official to ... publicly say in a council meeting that somebody should resign."
Having seen the investigation report, Mr Yule said the district council had an "absolutely different theory" to how the contamination occurred, to what was suggested by the regional council.
They would be putting this view to the Inquiry, and the prosecution.
Yesterday Mr Kirton also said the regional council did not come out of the situation "scot-free" either, as it was clear the monitoring regime in place for these consents was "deficient".
"5200 people in Havelock North were greatly inconvenienced and were exposed to something they should never have been exposed to, should the Hastings District Council have met its obligations to the public," he said, "in our role we should have been all over them like a rash a long time ago."