Williams said, where appropriate, incidents were reported to the police and existing protocols were reviewed and changed if necessary to further minimise the risk to people's safety.
Frontline staff were trained in how to deal with situations with the potential to escalate and where they or others felt under threat, he said.
The figures come as the Tauranga City Council experiences a surge of abuse and threats, but no physical assault, made to staff and contractors this year.
In the Western Bay of Plenty district, council staff and contractors also experienced an increase in abuse and assaults. In April, a compliance officer was kicked in the stomach while on the job in Pukehina.
Public Service Association (PSA) national secretary Glenn Barclay said public servants in front-facing roles periodically received this sort of treatment "but it should never become normalised".
"Local government and community services in New Zealand are stretched thin, especially so with the ongoing impact of Covid-19. A growing population across New Zealand has not always been matched with a corresponding increase in funding or infrastructure.
"This will take time to fix, but unless the problem receives urgent attention we are likely to see more of these problems."
Barclay said whenever threats or violence in the workplace were brought to the union's attention, it took it "extremely seriously".
"The PSA will do everything in our power to keep our members safe, and we will work constructively with councils to ensure that happens."
