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Hazardous Substances Surveillance

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Hazardous substance surveillance

The atlas provides data on hospital discharges due to exposure to hazardous substances. Hazardous substances are those chemicals that can cause specific types of hazard. According to the Hazardous Substances and New Organisms Act 1996 (HSNO Act), a substance is hazardous if it can explode, catch fire, oxidise, corrode, be toxic to humans or the environment.

Hazardous substances can have more than one hazardous property. A substance is also considered hazardous if it becomes hazardous in any of the ways listed above on contact with air or water.

Some substances are excluded from the HSNO Act, these are: medicines in fixed dose form, alcohol, drugs, food, carbon monoxide where the source was not from combustion of gas from a cylinder.

Data is given as a crude rate per 100,000 of the population.

Crude rates (CR) represent the proportion of people in a population who have been diagnosed with the specified condition each year. It illustrates the actual burden of disease within a population and can be used to compare groups with the same age distribution

District Health Boards

District health boards (DHBs) are responsible for providing or funding the provision of health services in their district. There are currently 20 DHB's in New Zealand.

Data tables

District Health Board National
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District Health Board National
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