Air Quality Monitoring
Date Station / Location Pollutant Averaging Concentration WHO Guideline AQI Category

AQI Category Distribution

Avg Concentration vs WHO Guideline (%)

Monthly Avg AQI Trend

Stations — Avg AQI

Reference limits follow the WHO Global Air Quality Guidelines (2021) and the US EPA NAAQS; the AQI index and category colours use the US EPA AQI methodology. Gas guideline values shown in ppb/ppm are converted from the WHO µg/m³ values at 25 °C / 1 atm. Add site- or country-specific pollutants and limits in Settings.

Pollutant Unit Averaging WHO 2021 Guideline US EPA NAAQS Source / Note
Date / TimeActionReferenceDetailsUser
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Monitoring Stations

Register your fixed monitoring stations / sampling points — they appear as suggestions in the New Measurement modal.

Custom Pollutants / Site Limits

Add pollutants not in the built-in library (e.g. H₂S, NH₃, TSP, dust deposition) or national limit values — they appear in the Pollutant list of the New Measurement modal and in Standards & Limits. AQI is not computed for custom pollutants; compliance is checked against the limit you set.

Exceedance Alert

Measurements at or above this AQI are highlighted in the register.