The city council's deadline to submit further information requested by the regional council has been extended to Monday.
The consents were to expire in October, but the city council's application was lodged six months before expiry, allowing the consent to roll over until new consents are agreed.
The two councils differ on how stormwater quality should be controlled.
Regional council resource management director Selva Selvarajah said the regional council would likely make a decision on whether the application would be notified publicly by the end of the week.
But it was "highly unlikely" it would not be, given the main tests on whether to notify a resource consent application were if adverse impacts were more than minor and whether all parties affected by the discharges could be identified. If not, it would usually be notified.
The regional council practice was usually to hold a hearing if an application was publicly notified, he said.
"In this case it is highly likely there would be a hearing. given the difference of opinion between the applicant and us."
A hearing would be held within two months of the application being notified.
A decision on notification would be made once the regional council was satisfied it had all the information it needed.
The composition of the hearing panel would be decided once a decision to have a hearing was made, Mr Selvarajah said.
The regional council could engage its own accredited commissioner, with that decision made on a case by case basis.
The applicant also had the ability to apply for an independent commissioner.
City council water and waste services acting manager Laura McElhone said the council had not made any decisions on that yet.
