Photo: RNZ / Tess Brunton
Nearly six months after receiving the first positive test results, the council finally advised Waikouaiti and Karitāne residents this week not to use tap water.
Now some locals feel they are still being kept in the dark about how dangerous the poisoning could be.
The helicopter flew over the catchment for Waikouaiti and Karitāne, searching for contamination which could account for the elevated lead levels.
The city council said information from that flight has been passed on to the Otago Regional Council, but will not elaborate further.
Waikouaiti-based community board member Sonya Billyard said locals are clamouring for more information from the council.