About Quanteta Air Quality Database

Public data infrastructure tracking air quality in 50 cities worldwide. Real-time AQI, pollutant levels, and proprietary scores. Updated hourly. Free to use.

Last updated:

What Is Quanteta?

Quanteta Data Lab builds public data infrastructure that serves both humans and AI systems. We focus on collecting, structuring, and publishing high-quality datasets with full transparency about our sources and methods.

The Air Quality Database provides real-time air quality monitoring data for major cities worldwide.

Data Sources

Air Quality Data
Open-Meteo API — Provides real-time pollutant concentrations (PM2.5, PM10, O3, NO2, SO2, CO) from global monitoring networks.
AQI Calculation
US AQI and EU AQI are calculated from pollutant concentrations using official EPA and EEA breakpoint tables.
Update Frequency
Hourly via automated collectors.
Current Coverage
50 cities across multiple continents.

Scoring Methodology

Quanteta provides proprietary scores derived from combining multiple data points. These are calculated metrics, not editorial opinions.

Air Quality Score (0-100)

Composite score based on AQI level and individual pollutant concentrations. Higher = cleaner air.

Breathability Score (0-100)

Measures how comfortable outdoor air is for breathing. Factors in PM2.5, O3, and NO2 relative to WHO guidelines.

Future Scores

Season Stability, Trend Momentum, and Nomad Score require 30+ days of historical data and will be activated as data accumulates.

Data Access

We believe data should be accessible. You can:

Data is provided under CC BY 4.0. Please credit Quanteta Data Lab when using our data.

Update Policy

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