Source: Fire and Emergency New Zealand
Firefighters will shortly be demobilising from Tuakau, where Fire and Emergency New Zealand has been responding to a hazardous substances incident tonight.
Assistant District Commander Brad Harvey says firefighters have been flushing the drains, and atmospheric readings now show that the air quality in and around the drains has returned to safe levels.
Residents who were evacuated earlier this evening are able to return home. The advice to other residents to stay inside with doors and windows shut has also been lifted.
The scene will be left in the hands of local water management staff. The nature and source of the substance which prompted the emergency response has not yet been established.
The crews of four fire appliances still on site will be preparing to depart shortly.