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Metrics dictionary

Metric names

These v2 metric names are unique across individual measurements and hourly/daily aggregations. That was not the case for the older v1 API. If you have older API code, watch out for changed metric names

Individual Samples

outputFrequency

minute

metric description
atmPressureIndividual Atmospheric pressure, Individual sample (atm)
bcAllSourcesIndividual Black carbon All sources mass concentration, Individual sample (ng/m³)
bcBiomassIndividual Black carbon Biomass mass concentration, Individual sample (ng/m³)
bcFossilFuelIndividual Black carbon Fossil fuel mass concentration, Individual sample (ng/m³)
bcSpectralBIndividual Black carbon Spectral B mass concentration, Individual sample (ng/m³)
bcSpectralGIndividual Black carbon Spectral G mass concentration, Individual sample (ng/m³)
bcSpectralIRIndividual Black carbon Spectral IR mass concentration, Individual sample (ng/m³)
bcSpectralRIndividual Black carbon Spectral R mass concentration, Individual sample (ng/m³)
bcSpectralUVIndividual Black carbon Spectral UV mass concentration, Individual sample (ng/m³)
no2ConcIndividual NO2 concentration, Individual sample (ppb)
o3ConcIndividual Ozone, Individual sample (ppb)
pm10ConcMassIndividual PM10 mass concentration, Individual sample (μg/m³)
pm10ConcNumIndividual PM10 number concentration, Individual sample (#/cm³)
pm1ConcMassIndividual PM1 mass concentration, Individual sample (μg/m³)
pm1ConcNumIndividual PM1 number concentration, Individual sample (#/cm³)
pm2_5ConcMassIndividual PM2.5 mass concentration, Individual sample (μg/m³)
pm2_5ConcNumIndividual PM2.5 number concentration, Individual sample (#/cm³)
relHumidAmbientIndividual Relative humidity ambient, Individual sample (%)
relHumidInternalIndividual Relative humidity internal, Individual sample (%)
temperatureAmbientIndividual Temperature ambient, Individual sample (°C)
temperatureInternalIndividual Temperature internal, Individual sample (°C)
windDirectionIndividual Wind direction, Individual sample (°)
windSpeedIndividual Wind speed, Individual sample (m/sec)

Hour Aggregations

outputFrequency

hour

metric description
atmPressure1HourMean Atmospheric pressure, 1-hour mean (atm)
bcAllSources1HourMean Black carbon All sources mass concentration, 1-hour mean (ng/m³)
bcBiomass1HourMean Black carbon Biomass mass concentration, 1-hour mean (ng/m³)
bcFossilFuel1HourMean Black carbon Fossil fuel mass concentration, 1-hour mean (ng/m³)
bcSpectralB1HourMean Black carbon Spectral B mass concentration, 1-hour mean (ng/m³)
bcSpectralG1HourMean Black carbon Spectral G mass concentration, 1-hour mean (ng/m³)
bcSpectralIR1HourMean Black carbon Spectral IR mass concentration, 1-hour mean (ng/m³)
bcSpectralR1HourMean Black carbon Spectral R mass concentration, 1-hour mean (ng/m³)
bcSpectralUV1HourMean Black carbon Spectral UV mass concentration, 1-hour mean (ng/m³)
no2Conc1HourMean NO2 concentration, 1-hour mean (ppb)
no2Conc1HourMeanUsEpaAqi NO2 concentration, 1-hour mean, UsEpaAqi
updated to 2024 standard
no2Conc1HourMeanWaDwerAqi NO2 concentration, 1-hour mean, WaDwerAqi
o3Conc1HourMean Ozone, 1-hour mean (ppb)
o3Conc1HourMeanWaDwerAqi Ozone, 1-hour mean, WaDwerAqi
pm10ConcMass1HourMean PM10 mass concentration, 1-hour mean (μg/m³)
pm10ConcMass1HourMeanWaDwerAqi PM10 mass concentration, 1-hour mean, WaDwerAqi
pm10ConcMass24HourRollingMean PM10 mass concentration, 24-hour rolling mean (μg/m³)
pm10ConcNum1HourMean PM10 number concentration, 1-hour mean (#/cm³)
pm10ConcNum24HourRollingMean PM10 number concentration, 24-hour rolling mean (#/cm³)
pm1ConcMass1HourMean PM1 mass concentration, 1-hour mean (μg/m³)
pm1ConcNum1HourMean PM1 number concentration, 1-hour mean (#/cm³)
pm2_5ConcMass1HourMean PM2.5 mass concentration, 1-hour mean (μg/m³)
pm2_5ConcMass1HourMeanWaDwerAqi PM2.5 mass concentration, 1-hour mean, WaDwerAqi
pm2_5ConcMass24HourRollingMean PM2.5 mass concentration, 24-hour rolling mean (μg/m³)
pm2_5ConcMassNowcast PM2.5 mass concentration, Nowcast (μg/m³)
pm2_5ConcMassNowcastUsEpaAqi PM2.5 mass concentration, Nowcast, UsEpaAqi
pm2_5ConcNum1HourMean PM2.5 number concentration, 1-hour mean (#/cm³)
pm2_5ConcNum24HourRollingMean PM2.5 number concentration, 24-hour rolling mean (#/cm³)
relHumidAmbient1HourMean Relative humidity ambient, 1-hour mean (%)
relHumidInternal1HourMean Relative humidity internal, 1-hour mean (%)
temperatureAmbient1HourMean Temperature ambient, 1-hour mean (°C)
temperatureInternal1HourMean Temperature internal, 1-hour mean (°C)
windDirection1HourMean Wind direction, 1-hour mean (°)
windSpeed1HourMean Wind speed, 1-hour mean (m/sec)

Day Aggregations

outputFrequency

day

metric description
atmPressure24HourMean Atmospheric pressure, 24-hour mean (atm)
bcAllSources24HourMean Black carbon All sources mass concentration, 24-hour mean (ng/m³)
bcBiomass24HourMean Black carbon Biomass mass concentration, 24-hour mean (ng/m³)
bcFossilFuel24HourMean Black carbon Fossil fuel mass concentration, 24-hour mean (ng/m³)
bcSpectralB24HourMean Black carbon Spectral B mass concentration, 24-hour mean (ng/m³)
bcSpectralG24HourMean Black carbon Spectral G mass concentration, 24-hour mean (ng/m³)
bcSpectralIR24HourMean Black carbon Spectral IR mass concentration, 24-hour mean (ng/m³)
bcSpectralR24HourMean Black carbon Spectral R mass concentration, 24-hour mean (ng/m³)
bcSpectralUV24HourMean Black carbon Spectral UV mass concentration, 24-hour mean (ng/m³)
no2Conc24HourMean NO2 concentration, 24-hour mean (ppb)
o3Conc24HourMean Ozone, 24-hour mean (ppb)
pm10ConcMass24HourMean PM10 mass concentration, 24-hour mean (μg/m³)
pm10ConcMass24HourMeanUsEpaAqi PM10 mass concentration, 24-hour mean, UsEpaAqi
updated to 2024 standard
pm10ConcNum24HourMean PM10 number concentration, 24-hour mean (#/cm³)
pm1ConcMass24HourMean PM1 mass concentration, 24-hour mean (μg/m³)
pm1ConcNum24HourMean PM1 number concentration, 24-hour mean (#/cm³)
pm2_5ConcMass24HourMean PM2.5 mass concentration, 24-hour mean (μg/m³)
pm2_5ConcMass24HourMeanUsEpaAqi PM2.5 mass concentration, 24-hour mean, UsEpaAqi
pm2_5ConcNum24HourMean PM2.5 number concentration, 24-hour mean (#/cm³)
relHumidAmbient24HourMean Relative humidity ambient, 24-hour mean (%)
relHumidInternal24HourMean Relative humidity internal, 24-hour mean (%)
temperatureAmbient24HourMean Temperature ambient, 24-hour mean (°C)
temperatureInternal24HourMean Temperature internal, 24-hour mean (°C)
windDirection24HourMean Wind direction, 24-hour mean (°)
windSpeed24HourMean Wind speed, 24-hour mean (m/sec)