Logging being carried out around the dams which feed Marton's town water supply has been suspended because of the risk on sediment run-off.
Crews began felling trees on behalf of the Rangitikei District Council at the Marton B and C dams on May 9 but were forced to stop just three days later.
The logging was suspended on May 12 because of the risk of sediment runoff exacerbated by heavy rain, a report by council chief executive Ross McNeil said.
That same week the Marton water became discoloured and odorous with residents complaining it was coffee-coloured and undrinkable.
The area received three days of heavy rainfall in early May.