The notification process is triggered when a person returns a blood lead test that shows an elevated blood lead level.  If the results of the blood test meet or exceed the notification level then the health practitioner (or medical laboratory) reports this to their to their local medical officers of health for further follow-up. 


The prior notification level of 0.48 (or greater) micromoles per litre of blood (µmol/l) was reduced to  0.24 µmol/l (or greater) on 9 April 2021.


This allows the source of the lead exposure to be identified and health risks managed.

  • Public health services can follow up notifications and manage non-occupational exposures
  • If medical officers of health reasonably believe that any given case arises from workplace exposure then they must advise WorkSafe New Zealand for follow-up.

The most common source of lead exposure in a household setting is from lead-based paint that was used on older houses.  Over time such paint can deteriorate, or be removed in renovations. If not managed properly people can be exposed to it.

More Information

 More information about lead poisoning, symptoms, prevention, and lead notifications is available our website:


The Notifiable and Infectious Diseases Order 2021 made the change.