"We are facing pressures from all sorts of directions - environmental, compliance with Plan Change 6 for the Tukituki catchment, and increasing drinking water standards particularly as a result of the Havelock North water inquiry.
"We have residential growth forecast to increase, and there's a serious risk of having to decrease the level of service if we do not put more investment in water networks.
"The sad truth is adequate renewal investment into our core infrastructure has not been a possibility for years because of affordability and financial constraints."
She said there were houses being built that wanted access to water but could not be connected, in some sections of the network the water pipes were too small, and in some areas fire appliances could not connect to hydrant mains because there was not adequate pressure.
"We need to kick-start investment now to ensure our children and grandchildren are not dealing with bigger problems that we leave behind."
She said the projected growth would enable the costs to be spread across more residents, ratepayers and businesses, but the impact of that had not been included in the current draft plan.
She added that the council was vigorously pursuing other funding opportunities and seeking innovative ways to alleviate the situation, and discussions were being held with Local Government New Zealand at district, regional and national levels to lobby the Government for increased support.