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Tristram Street

Benzene, ethyl-benzene, toluene and xylenes (BTEX) were monitored in Hamilton at the Tristram Street traffic monitoring site from a roadside street lighting pole on a 3 monthly basis from December 2006 to March 2021 using passive 3M desorption badges. Large decreases in BTEX concentrations were observed over the monitoring period and were attributed to changes in fuel specifications and improved vehicle technology. Monitoring at this site was discontinued from March 2021 after consistently low annual concentrations were confirmed, well below the relevant Ministry for the Environment thresholds and USEPA Reference concentration values.

Results of this monitoring are available from the Waikato Regional Council Technical Report Ambient air quality monitoring report for the Waikato Region – 1998 to 2020.

Scientific Indicators

Scientific data for this site

This dashboard shows the latest results for air quality indicators collected by regional councils and unitary authorities. Indicators are shown against the National Environmental Standards for Air Quality (NES-AQ). Where no national standards exist for the air quality measurements shown, the data are compared against other guidelines (e.g. World Health Organization (WHO) 2021 guidelines, Ambient Air Quality Guidelines (AAQG)).

Select 'Show more information +' under a dashboard to see the current and historical monitoring data.