Cross-regional AQI standards
Different countries and regions use different Air Quality Index scales to measure and report pollution levels. AirScape normalizes these standards so you can compare air quality across borders.
Why standards differ
Air quality standards vary because:
- Health research: Different studies inform different thresholds
- Local conditions: Baseline pollution levels vary by region
- Regulatory priorities: Governments set different acceptable limits
- Historical context: Standards evolve at different paces
Common AQI standards
| Region | Scale | Levels |
|---|---|---|
| US EPA | 0-500 | 6 categories from Good to Hazardous |
| EU (CAQI) | 0-100+ | 5 categories from Very Low to Very High |
| UK DAQI | 1-10 | 4 bands from Low to Very High |
| China | 0-500 | 6 levels similar to US EPA |
| India | 0-500 | 6 categories from Good to Severe |
How AirScape handles this
AirScape provides a unified view by:
- Normalizing values: Converting all readings to a comparable scale
- Showing original data: Displaying the local standard alongside normalized values
- Color coding: Using consistent colors across regions for easy comparison
- Health guidance: Providing recommendations based on actual pollutant concentrations
Comparing locations globally
When comparing air quality between different countries:
- Use AirScape's normalized AQI for direct comparison
- Check the actual pollutant concentrations (PM2.5, NO2, etc.) for precise data
- Consider local standards if you need to understand regulatory compliance
- Remember that "Good" air quality may mean different things in different standards
Which standard does AirScape use?
AirScape primarily displays the US EPA AQI standard as it's widely recognized internationally. However, we also show data relevant to your location's local standards when available.