Photo: RNZ / Cole Eastham-Farrelly
Wellington Water says new facilities at the Te Marua and Gear Island Water Treatment Plants are now reliably fluoridating drinking water.
The company came under fire earlier this year, following revelations that it had turned off fluoride at the two plants without telling the board, councils, or residents.
And ensuing independent review into the events, conducted by Martin Jenkins, revealed that water in Wellington had been inconsistently fluoridated for the last six years.
It also found found there was a lack of urgency from Wellington Water to get the fluoridation problem fixed.
The company was told to focus on getting fluoride back into Wellington's water systems, and to fix its communication and leadership problems.
Chief executive Colin Crampton said: "since then, we've had a team of dedicated Wellington Water employees working tirelessly to build new facilities and get fluoride back on".
"The testing of the facilities has gone well, and we have been in the Ministry of Health target range for fluoride for most of September."
Wellington Water said it was also close to implementing all five recommendations from the following inquiry into the events.
"We have made key changes in our organisation to ensure that we maintain a relentless focus on fluoridation," Crampton said.
"The next steps will be to report back to our Board to formally close out the inquiry."