Waikato Regional Council monitors air quality in urban areas across the Waikato region. Fine particulate (PM10) is the contaminant typically associated with domestic woodburner smoke and the region’s main air contaminant of concern. The Regional Policy Statement focus for air is avoidance of unacceptable risks to human health and ecosystems, with achieving compliance with National Environmental Standards a high priority. Emphasis is placed on controlling discharges from solid fuel burners and open fires, the main source of air pollution in our region, but also recognises the importance of controlling discharges from other sources such as transport and industry and also outdoor burning. Air quality is worst in urban areas where cold, calm conditions occur over winter and there is a large number of woodburners. The region’s best areas are typically where there is good air movement over winter, such as coastal towns or towns where there is a low density of woodburners. The Waikato region has 20 gazetted urban airsheds: Cambridge, Hamilton, Huntly, Matamata, Morrinsville, Ngaruawahia, Otorohanga, Paeroa, Putaruru, Taupo, Te Aroha, Te Awamutu-Kihikihi, Te Kuiti, Thames, Tokoroa, Tuakau, Turangi, Waihi, Whangamata and Whitianga. The 10 airsheds identified in bold are currently monitored by Waikato Regional Council for PM10. Four of these also have meteorological stations installed. In addition the town of Huntly is monitored at three sites within the Huntly airshed by Genesis Energy Ltd, as a requirement of their air discharge consent for operation of the Huntly Power Station. Monitoring data for the Huntly airshed is not included on this website because it is not collected by Waikato Regional Council’s monitoring programme. Since the 20 urban airsheds were gazetted, monitoring has shown that four of these airsheds (Putaruru, Taupo, Te Kuiti and Tokoroa) are polluted as defined by the National Environmental Standards for Air Quality. Six of the gazetted airsheds (Otorohanga, Paeroa, Te Aroha, Tuakau, Waihi, Whangamata and Whitianga) have yet to be monitored. A rolling programme to complete surveying of all 20 urban airsheds by 2025 is in place. It involves disestablishing monitoring sites where three or more years of monitoring has indicated no exceedances of the National Environmental Standards for Air Quality, and redeploying monitoring equipment to airsheds which have not yet been monitored. Long term monitoring of benzene and associated monoaromatic compounds (BTEX) is also undertaken at six passive traffic monitoring sites around Hamilton. Waikato Regional Council has also undertaken short term survey monitoring of PM2.5, NO2, SO2, CO and O3 in Hamilton and of O3 in Coromandel township. Long term monitoring of PM2.5 in Tokoroa was also initiated during the winter of 2015.