Essential workers are also able to book into a clinic by calling Healthline 0800 28 29 26.
Among those invited to Sunday's clinic were Flaxmere New World staff.
Prime Minister Jacinda Ardern announced last week that essential workers including 50,000 supermarket workers would be prioritised for Covid-19 vaccinations across the country.
"We received an email on Saturday to come on Sunday," Chris Hart, the Flaxmere New World owner, said.
"The girls we were dealing with at the District Health Board were very, very helpful."
He said 20 staff from his supermarket opted to go down on Sunday for the jab, and they would receive their second dose in three weeks' time.
"It is a stressful time and I guess it is a bit of reassurance for our safety to have that.
"We are obviously not bulletproof."
Supermarket, petrol station and dairy workers have become frontline staff during the latest lockdown as most other stores remain closed.
The current level 4 lockdown was announced on August 17 across New Zealand to prevent the spread of the Delta strain of Covid-19.
Some supermarkets have seen lines out the door in the Hawke's Bay as staff try to control social distancing restrictions.
Pak'nSave Tamatea saw a line of about 25 waiting to go inside on Saturday afternoon as people flocked to buy groceries and essential items.
