If the tenancy agreement says that water is included in the rent, then of course the tenant doesn't need to pay for anything.
I found the following article from the New Zealand Herald dated 21 July 2013 written by Amanda Snow:
"Tenants Pay For Their Landlords' Water Bills
Budgeting services says majority of landlords wrongly passing on fixed charge.
Thousands of tenants are picking up the tab for water bills that should be paid by their landlords.
The annual fixed water charge in Auckland of $190 is the responsibility of property owners but budgeting services fear low income tenants have been footing the bill because it's lumped in with water use charges on monthly Watercare invoices.
Darryl Evans, head of Mangere Budgeting Services, says most tenants wrongly believe it is their responsibility to pay the fixed charge. Evans wants Watercare to spell that out on invoices.
"Out of 100 clients, we'd see 99 landlords pass that charge onto the tenant. We are only aware of two landlords who actually pay that charge," he said.
This week, the Herald on Sunday raised the matter with Watercare which agreed to take another look at its invoices.
The Watercare charges are currently itemised as volumetric and fixed charges on the paperwork - but there's no clarification about who should pay.
Evans said there were cases where landlords have even tried passing on their entire rates bills to tenants."It's not common, but some landlords try their luck."
Julia Hart, co-ordinator of North Harbour Budgeting Services, said the extra cost can mean the difference between tenants being able to take their child to a doctor or not.
Her advisers check their clients aren't paying the landlords' component of the bill, but she suspects landlords are unaware of the rules rather than acting deliberately. Hart agrees it needs to be clarified for both parties.
This week, a Watercare spokeswoman said it would consider clarifying the responsibilities on the 390,000 invoices sent to residential customers each month. "This is definitely something we will look at doing. We are planning a system upgrade which will provide greater flexibility in the future."
The spokeswoman confirmed there had already been queries about the charges since monthly invoicing began a year ago.
The Citizens Advice Bureau said it had fielded 140 inquiries in the past year - most from people confused about who should pay.
An estimated 20 per cent of the 120,000 rental properties in Auckland are managed by rental agencies, which appear to be in the clear as most bill landlords and the tenants separately for appropriate charges.
The Ministry of Business, Innovation and Employment says the annual fixed water charge is imposed whether the property is occupied or not, and is therefore the responsibility of the landlord.
All other water use charges would usually be tenants' responsibility. The ministry advises tenants who have paid the fixed charge to ask for their money back."