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µg/m³ micrograms per cubic metre
µm micrometre
AAQG Ambient Air Quality Guidelines
AS/NZS Australian / New Zealand Standard
BAM beta attenuation monitor
BaP benzo(a)pyrene
BS EN British Standards Institution European Norm standard
CFR United States Code of Federal Regulations (40 CFR 51 is the same as Title 40, Part 51 of the CFR)
CO carbon monoxide
DAS data acquisition system / datalogger
FDMS filter dynamics measurement system
H2S hydrogen sulphide
Hi-vol high-volume sampler
mg/m³ milligrams per cubic metre
NAQWG National Air Quality Working Group
NES national environmental standards
NIWA National Institute of Water and Atmospheric Research Limited
NMHC non-methane hydrocarbon
NO nitric oxide
NO2 nitrogen dioxide
NOx oxides of nitrogen (eg, nitrogen dioxide and nitrous oxide)
NZST New Zealand Standard Time
O3 ozone
PAH polycyclic aromatic hydrocarbon
PM2.5 particulate matter with an aerodynamic diameter of 2.5 microns or less
PM10 particulate matter with an aerodynamic diameter of 10 microns or less
PMT photomultiplier tube
ppb parts per billion
ppm parts per million
RMA Resource Management Act 1991
SO2 sulphur dioxide
TEOM tapered element oscillating microbalance
TSP total suspended particulate
USEPA United States Environmental Protection Agency
UV ultraviolet
VOC volatile organic compounds


World Health Organization