Auckland households received $149,000 of hardship relief on water bills in the first year of a trust set up by Watercare Services.
Since March last year, 156 people have completed an application process which involves household budget advisers and trust members reviewing personal finances.
However, Mangere Budgeting Services chief executive Darryl Evans said the figure showed that few people knew help was available.
"People are really struggling and it's not just to pay very high water bills.
"In South Auckland, a large percentage of our families have four-plus children so showers and baths and doing the washing costs an awful lot and they use a lot of water to keep their garden alive."