He said toxic effects impacted on included lungs, the reproductive system, the brain and nervous system, the gut and DNA and chromosomes.
"More and more countries are moving to ban or restrict its use."
The latest authority to ban its use was the California Environmental Protection Agency which said it would list glyphosate as a substance known to cause cancer.
The council agreed to review its use of glyphosate after the New Zealand Environmental Protection Agency had delivered its findings on the agrichemical.
A report to the meeting said that the World Health Organisation recently classified glyphosate as a "probably carcinogenic" following a study by the International Agency for Research on Cancer, with experts from 11 countries.
Councillor Matt Cowley said there was public pressure to reduce toxicity. There was a balance between cost and effectiveness and the council was on the right transition. "We are looking at alternatives and what we are proposing is right on the button."