Armidale is a city in the Northern Tablelands, New South Wales, Australia. Armidale had a population of 29,317 as of June 2022. It is the administrative centre for the Northern Tablelands region. It is approximately halfway between Sydney and Brisbane at the junction of the New England Highway and Waterfall Way. Armidale is on the banks of Dumaresq Creek, in the Northern Tablelands in the New England region about midway between Sydney and Brisbane at an altitude (980 m AHD) ranging from 970 metres at the valley's floor to 1,110 metres above sea level at the crests of the hills. A short distance to the east of Armidale are heavily forested steep gorges dropping down to the eastern coastal plain. Large parts of the highlands are covered by Palaeozoic aged metamorphosed sedimentary rocks. Intruding into these meta-sediments are granite plutons which decompose to form sandy soil, slightly deficient in nutrients. There are also basalt flows which are more fertile for the soil substrates. Those areas away from the deep gorge country tend to display gently undulating terrain mainly used for pastures and where granites occur the areas are usually covered in bushland. The area contains a number of places of outstanding natural beauty and scientific interest as well as several World Heritage national parks including the New England National Park and the Oxley Wild Rivers National Park. To the west is Mount Yarrowyck Nature Reserve. The critically endangered New England Peppermint Grassy Woodland is the main vegetation community in the region. The coastal plain can be reached directly at Coffs Harbour via Waterfall Way to Dorrigo and Bellingen on the Bellinger River, a two-hour drive. During winter there is a problem with some air quality reduction caused by the use of solid fuel domestic wood heaters. A peer-reviewed study carried out by the University of New England in 2007 found winter woodsmoke causes 8.8 additional visits per day to GPs in Armidale for respiratory complaints, i.e., about 750 additional visits per year.