Geraldine submitters have overwhelmingly rejected a bid to chlorinate the water supply, sourced from a bore near the Orari River.
Some 97 per cent of the 427 submitters to the draft Long Term Plan of the Timaru council opposed chlorination.
As well, there were two submissions opposing the chlorination of the Pleasant Point supply and two opposing the chlorination of both supplies.
There was also a petition signed by 296 people opposing the chlorination of the Geraldine supply.
A big crowd also turned out for an information evening addressed by council staff and opponents of the chlorination proposal.
Timaru councillors met this week to consider submissions to its draft Long Term Plan.
Submitters said the ultra-violet treatment of the supply provided a “healthy, clean water”. but officers said UV treatment was adequate to treat raw water for bacteria and protozoa, but the main risk was recontamination or regrowth in the distribution system.
Staff said chlorine had been used as a water disinfectant for 100 years and was a major factor in reducing illness and deaths from water-borne diseases and remained the most common disinfectant in the world.
It said drinking water, with relatively low levels of chlorine does not have any detrimental impact on plants.
Submitters were concerned about the need for chlorination and taste and smell.