What the results tell us for Young
In 1999–2000 ten substances emitted to air in Young Shire were reported to the National Pollutant Inventory (NPI). The number of substances decreased to eight in 2000–01 and 2001–02, and seven in 2002–03, and increased to nine in 2003–04.
Two facilities in the shire area reported to the NPI for most of the reporting period—Hill & Co (Young Depot/Abroray Pty Ltd), classified as 'Metal, Mineral and Chemical Wholesaling' and Rylevisa (Feedlot) Pty Ltd, classified as 'Grain, Sheep and Beef Cattle Farming'.
Another seven facilities classified as 'Other Livestock Farming' reported for the first time in 2003–04. They are Cynray Pty Ltd (Dead Horse Gully Piggery), Golden Grove Piggery, Geoffrey B. Edgerton (Redlands Piggery), Koorani Piggery, Larkray Pty Ltd (Wonga Piggery), Little Windridge Piggery and Templemore Piggery. All these facilities were located in Young except for Templemore Piggery which is located in Murringo.
All nine facilities were low emitters of all reported substances relative to other facilities in Australia.
This is the first report of air emissions in the Council's State of the Environment reports.
For comprehensive details of air emissions reported to the NPI in this shire, such as the types and quantities of substances emitted, see the NPI website www.npi.gov.au.
About the data
This explanatory note was taken from the NPI website at www.npi.gov.au maintained by the Commonwealth Department of Environment and Heritage (2005).
The NPI holds emission data reported by industrial facilities, and diffuse data collected by participating jurisdictions. Industrial facilities are required to report emissions to the NPI if they use more than a certain amount of one or more substances on the NPI reporting list, or consume more than a specified amount of fuel or electric power, or emit more than a certain amount of nitrogen or phosphorus to water. Diffuse data sources include smaller facilities that are not required to report, and mobile and non-industrial sources such as transport, domestic activities and for water catchments and land use type.
The techniques used to estimate emissions in the NPI have been variously approved by Commonwealth, State and Territory environment agencies but it is important to note that the accuracy of these estimates is likely to vary according to the technique used. For the diffuse data in particular, comparative analysis of the data may be misleading, because jurisdictions may have used different approved estimation techniques. Industrial facilities estimate emissions using a technique described in an appropriate NPI handbook, or else otherwise approved.
The listed substances span a wide range of toxicities. A small number may not necessarily imply an insignificant emission: for example, a small emission of a highly toxic substance may be of more concern than a larger emission of a substance of relatively lower toxicity. All emission amounts reported here have been rounded to two significant figures; totals may differ from the sum of the individual amounts on these reports because of this rounding. Some minor discrepancies may also occur with catchment and airshed data, particularly when queried at a fine spatial resolution such as a postcode. This is because these data are collected at varying spatial resolutions.
Department of Environment and Heritage (2005) National Pollutant Inventory, Commonwealth of Australia, viewed 27 April 2005, www.npi.gov.au.