Report: TR 2014/05
Author: J Caldwell
Air quality monitoring in the Waikato region focuses primarily on concentrations of PM10, the main air contaminant of concern.
The National Environmental Standards for Air Quality (NESAQ) has set a maximum concentration limit for PM10 of 50 µg/m3 when averaged over 24 hours (referred to as an ambient air quality standard). The NESAQ allows for one exceedance of this standard per rolling 12-month period. More than one exceedance within a rolling 12-month period is a breach of the standard. The NESAQ requires air quality monitoring to take place in areas that are likely to exceed the standard for PM10.
The 2011 amendment to the NESAQ has introduced extended timeframes for airsheds to comply with the standard for PM10. Airsheds are split in to three categories, depending on the average number of exceedances the airshed has for the previous five year period.
During 2013, concentrations of PM10 were measured by Waikato Regional Council in eight out of the region’s 20 gazetted airsheds, with two stations located in the Hamilton airshed and one each in the Tokoroa, Taupō, Te Kuiti, Putaruru, Turangi, Cambridge and Te Awamutu-Kihikihi airsheds. Carbon monoxide (CO), nitrogen dioxide (NO2), benzene, toluene, ethylbenzene and xylenes were also measured in Hamilton during 2013.
This report compares contaminant concentrations measured in these airsheds to the NESAQ standards and to the Ministry for the Environment’s air quality guidelines and indicator categories.
|3.1||Air quality monitoring in Hamilton|
|3.2||PM10 concentrations for Hamilton|
|3.3||Concentrations of benzene, toluene and xylenes|
|3.4||Concentrations of carbon monoxide|
|3.5||Concentrations of nitrogen dioxide|
|3.6||Comparison of meteorological conditions for 2013 to previous years|
|3.7||Daily variations on high pollution days|
|4.1||Air quality monitoring in Tokoroa|
|4.2||PM10 concentrations in Tokoroa|
|4.3||Daily variations in PM10 and meteorology on high pollution days|
|5.1||Air quality monitoring in Taupō|
|5.2||PM10 concentrations in Taupō|
|5.3||Daily variations in PM10 and meterology on high pollution days|
|6.1||Air quality monitoring in Te Kuiti|
|6.2||PM10 concentrations in Te Kuiti|
|6.3||Daily variations in PM10 and meterology on high pollution days|
|7.1||Air quality monitoring in Putaruru|
|7.2||PM10 concentrations in Putaruru|
|7.3||Daily variations in PM10 and meterology on high pollution days|
|8.1||Air quality monitoring in Turangi|
|8.2||PM10 concentrations in Turangi|
|9.1||Air quality monitoring in Cambridge|
|9.2||PM10 concentrations in Cambridge|
|10.1||Air quality monitoring in Te Awamutu-Kihikihi|
|10.2||PM10 concentrations in Te Awamutu-Kihikihi|
|Appendices - References to spreadsheets of raw data|