Air and sun

Air Quality Index Lookup

Enter a place name to see its published air-quality reading, with time and source. Reading only — no personal verdict, no personal advice.

Published 6 November 2026 · Last reviewed 7 November 2026 · Next review 7 May 2027

Air Quality Index Lookup — flat illustration. — Illustration: Public Health (original)

Look up a published reading for a place

GoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardous

This tool gives a reading only — no personal verdict and no personal advice.

About this tool

Open-Meteo is the data feed for this lookup (geocoding plus air-quality API). EPA AirNow is the official US Air Quality Index authority, and WHO sets the guideline values. A published reading from a feed is not a regulatory monitor reading.

The Air Quality Index is a single-number scale that turns several pollutant readings into one band, from Good to Hazardous, so a reader can compare places and days without reading raw concentrations. The bands on this page are the official US Environmental Protection Agency (EPA) AirNow scale; the World Health Organization sets guideline values for the individual pollutants, which are stricter than the index bands and are the long-term health benchmark. A published reading from a data feed is not the same as a regulatory monitor reading: it is a modelled or reported value for a place and time, and it does not say whether the air is safe for any individual. This lookup reports the reading, its band, the time it was published, and the pollutant values behind it (PM2.5, PM10 and ozone, in micrograms per cubic metre), and nothing more. It gives no personal verdict and no personal advice. Note that not every country publishes an AQI: Nigeria, for example, has no public AQI portal, and the air-quality guide on this site says so rather than inventing a number.

Sources

Awareness only

General information. It is not medical advice and does not assess your own situation.

What the reading means

EPA Air Quality Index band	Range	What it means (EPA AirNow)
Good	0–50	Air quality is satisfactory.
Moderate	51–100	Air quality is acceptable.
Unhealthy for Sensitive Groups	101–150	Sensitive groups may experience health effects.
Unhealthy	151–200	Everyone may begin to experience health effects.
Very Unhealthy	201–300	Health alert: the risk of health effects is increased for everyone.
Hazardous	301–500	Health warning of emergency conditions.

WHO guideline context: 99% of the world’s population breathes air above WHO guideline limits (WHO). The index shown is the US Air Quality Index; WHO sets guideline values for pollutants, and the EPA AirNow scale defines the bands above.