What do toothpaste, explosives, veterinary medicine and solvents have in common? They are all classified as hazardous substances, which we regulate.
Hazardous substances are any chemical, or mixture of chemicals, that meets hazardous classification criteria. These criteria include:
- explosiveness
- flammability
- toxicity to people
- ability to cause cancer
- toxicity to the environment
- their ability to generate a different hazardous substance on contact with air or water.
Hazardous substances – including petrol, solvents, explosives, industrial chemicals, fireworks, agrichemicals, household cleaners and cosmetics — need to be approved before they can be used in New Zealand.
We are New Zealand's environmental regulator
We regulate pesticides, household chemicals and other dangerous goods and substances under the Hazardous Substances and New Organisms Act 1996. We make decisions on whether to approve new hazardous substances. We put rules in place called controls to manage the risks of hazardous substances and to safeguard people and the environment.
Our approvals for hazardous substances are recorded in the HSNO application register. We do not provide certification of previous approvals and we don't issue registration certificates, composition certificates, or the like. Anyone can access the HSNO application register to confirm whether a substance is approved or not.
A substance can only be approved if the positive effects (the benefits) outweigh the adverse effects (the risks and costs).
As well as evaluating and approving substances, we can reassess substances and make new decisions about whether the controls need to be updated, or whether the substance needs to be banned.
We also administer hazardous waste and ozone-depleting substances.
Our Safer Homes programme has advice on keeping yourself, whānau, and the environment safe around hazardous substances.
Hazardous Substances Update
Get all the latest decisions and news from our hazardous substances team straight to your inbox.
How we assess applications and make decisions
HSNO Risk Assessment Model
We rely on information from scientific data and evidence, economic information, grass-roots and local information, as well as cultural perspectives.
Our five key areas
Information is gathered and assessed against five areas to determine the risks and benefits:
- Environment
- Public health
- Economy
- People and communications
- Māori culture.
Weighting
As assessment of magnitude and likelihood is made to determine the weighting of each risk and benefit:
- Significant benefit
- Negligible
- Significant risk.
Benefits versus risks
Combined benefits and risks are compared to achieve a complete picture.
Decision
Based on an evaluation of risks, benefits and risk management options, a decision is reached.
