A report claiming Napier and Wairoa councils have under-invested in vital infrastructure was partly based on financial information flagged as "deceiving" by independent consultants who compiled it for the Local Government Commission.
The consulting firm says despite inconsistencies in the information it collected, it is confident it provided the commission with an accurate "overall picture" of the financial state of Hawke's Bay's councils.
The report has outraged Napier City Council which disputes the commission's claim that Napier ratepayers would need to spend tens of millions of dollars catching up on the city's spending on roads and water systems compared to other parts of the region.
The five-page report, released by the commission on Friday, said Napier and Wairoa had less total debt, and more financial assets, than the Hastings and Central Hawke's Bay district councils.
"Put simply, improving Napier City Council's infrastructural assets to have the same residual life as the average across the region would require all of Napier's $78.6 million of net financial assets and a further $45 million. In contrast, Hastings' infrastructure assets have a longer residual life than the regional average," the commission said in its report.