Breathe Easy: Navigating the World of Air Quality Indices

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Exploring Air Quality Indexes Worldwide: A Look into Varied Systems and Local Measurements. Discover the Diverse AQI Systems and Localized Indices for Countries Across the Globe.

The list of monitored pollutants in different countries:

Particulate Matter (PM_2.5)
Particulate Matter (PM₁₀)
Ozone (O₃)
Nitrogen dioxide (NO₂)
Carbon monoxide (CO)
Sulfur dioxide (SO₂)

Every pollutant is observed for a specific duration, after which its value is employed in calculating the index. Every country has its unique way of representing index ranges. If the range isn't defined, a textual description is utilized.

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Air Quality Indices by Country

Air Quality Index	Country	Range	PM_2.5	PM₁₀	O₃	NO₂	CO	SO₂
IQA (AD)	Andorra	1-6	24h	24h	1h	1h	8h	1h
AQI (AU)	Australia (NEPM)	0-200	24h	24h	1h/4h	1h	8h	1h
AQC (AU-NSW)	Australia (NSW)	0-200	24h	24h	1h/4h	1h	8h	1h
AQI (AT)	Austria	1-5	-	24h	1h/8h	0.5h/24h	1h/8h	0.5h/24h
AQI (AT-Vienna)	Austria (Vienna)	1-6	-	24h	1h/8h	0.5h/24h	1h/8h	0.5h/24h
BelAQI (BE)	Belgium	1-10	24h	24h	1h	1h	-	-
AQI (BD)	Bangladesh	0-500	24h	24h	1h/8h	24h	8h	-
AQI (BG)	Bulgaria	1-10	-	1h	1h	1h	1h	1h
AQI (BR)	Brasil	0-200	24h	24h	8h	1h	8h	24h
AQHI (CA)	Canada	1-10+	3h	3h	3h	3h	-	-
CAQI (EU)	Europe	0-100	1h/24h	1h/24h	1h	1h	8h	1h
KBI (CH)	Switzerland	-	-	24h	1h	24h	-	-
AQI (CN)	China	0-500	24h	24h	1h/8h	24h	24h	24h
IBOCA (CO)	Colombia	0-100	24h	24h	8h	1h	8h	1h
ICCA (CR)	Costa Rica	0-100	24h	24h	1h	1h	8h	24h
AQI (CY)	Cyprus	1-4	1h	1h	1h	1h	1h	1h
AQI (CZ)	Czechia	-	-	3h	3h	3h	-	3h
LQI (DE)	Germany	-	24h	24h	1h	1h	-	-
IQCA (EC)	Ecuador	0-500	24h	24h	8h	1h	8h	24h
ICA (ES)	Spain	-	24h	24h	8h	1h	-	1h
AQI (EE)	Estonia	-	1h	1h	1h	1h	1h	1h
AQI (FI)	Finland	-	1h	1h	1h	1h	-	1h
IQA (FR)	France	-	24h	24h	24h	24h	-	24h
DAQI (UK)	United Kingdom	1-10	24h	24h	8h	1h	-	0.25h
AQHI (GI)	Gibraltar	1-10	24h	24h	8h	1h	8h	0.25h
AQHI (HK)	Hong Kong	1-10	3h	3h	3h	3h	-	3h
AQI (HU)	Hungary	1-10	-	24h	8h	1h	1h	1h

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Air Quality Index	Country	Range	PM_2.5	PM₁₀	O₃	NO₂	CO	SO₂
ISPU (ID)	India	0-500	24h	24h	24h	24h	24h	24h
NAQI (IN)	Indonesia	0-500	24h	24h	1h	24h	8h	24h
AQIH (IE)	Ireland	1-10	24h	24h	8h	1h	-	1h
AQI (IL)	Israel	100 to -400	24h	24h	8h	1h	0.5h	1h
CAI (KR)	South Korea	0-500	12h	12h	1h	1h	1h	1h
KAQI (KW)	Kuwait	0-500	-	24h	1h	1h	1h	1h
KBI (LI)	Liechtenstein	1-6	-	24h	1h	24h	-	-
OUI (LT)	Lithuania	1-5	-	24h	1h	1h	8h	1h
AQI (LU)	Luxembourg	1-10	-	24h	1h	1h	1h	1h
ICARS (MX)	Mexico (ICARS)	-	12h	12h	1h	1h	8h	24h
AQI (MK)	North Macedonia	-	1h	1h	1h	1h	1h	1h
AQI (MN)	Mongolia	0-500	24h	24h	1h	1h	1h	1h
API (MY)	Malaysia	0-500	24h	24h	1h	1h	8h	24h
LKI (NL)	Netherlands	1-11	1h	1h	1h	1h	-	-
AQI (NO)	Norway	-	1h	1h	1h	1h	-	1h
AQI (NZ)	New Zealand	-	24h	24h	1h	1h	1h	1h
INCA (PE)	Peru	-	24h	24h	8h	1h	8h	24h
AQI (PH)	Philippines	0-500	24h	24h	1h	1h	8h	24h
AQI (PL)	Poland	-	1h	1h	1h	1h	-	1h
IQar (PT)	Portugal	-	24h	24h	1h	1h	-	1h
AQI (RO)	Romania	1-6	-	24h	1h	1h	8h	1h
PSI (SG)	Singapore	0-500	24h	24h	1h	1h	8h	24h
SAQI_11 (RS)	Serbia	1-5	1h	1h	1h	1h	1h	1h
AQI (SK)	Slovakia	-	1h	1h	1h	1h	1h	1h
AQI (TH)	Thailand	0-200	24h	24h	8h	1h	8h	1h
HKI (TR)	Turkey	0-500	24h	24h	1h	1h	8h	1h
AQI (TW)	Taiwan	0-500	24h	24h	1h	1h	8h	1h
AQI (US)	United States	0-500	24h	24h	8h/1h	1h	8h	1h
AQI (VN)	Vietnam	0-500	24h	24h	1h	1h	1h	1h

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Expanded Pollutant Measures in Indexes

Ammonia (NH₃)
Benzene (C₆H₆)
Non-methane hydrocarbons (NMHC)
Nitrogen monoxide (NO)

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Air Quality Index	Country	Range	PM_2.5	PM₁₀	O₃	NO₂	CO	SO₂	NH₃	C₆H₆	NMHC	NO
AQI (CY)	Cyprus	1-4	1h	1h	1h	1h	1h	1h	-	1h	-	-
AQI (EE)	Estonia	-	1h	1h	1h	1h	1h	1h	1h	1h	-	-
NAQI (IN)	Indonesia	0-500	24h	24h	1h	24h	8h	24h	24h	-	-	-
AQI (LU)	Luxembourg	1-10	-	24h	1h	1h	1h	1h	-	-	-	1h

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Countries utilizing CAQI (EU)

Albania
Armenia
Belarus
Bosnia and Herzegovina
Croatia
Denmark
Georgia
Greece
Italy
Kosovo
Latvia
Malta
Mauritius
Moldova
Montenegro
Slovenia
Sweden
Ukraine

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Countries utilizing AQI (US)

American Samoa
Argentina
Azerbaijan
Bahamas
Bahrain
Brunei
Chile
Egypt
Ethiopia
Guam
Japan
Jordan
Kenya
Morocco
Nepal
Pakistan
Puerto Rico
Qatar
Saudi Arabia
South Africa
Sri Lanka
U.S. Virgin Islands
Uganda
United Arab Emirates
United States
Venezuela

Atmotube Air Quality Score (AQS)

Atmotube Air Quality Score (AQS) is the index used within the Atmotube app that complements Atmotube air quality monitors.

Atmotube PRO, the latest generation in this product line, is a wearable, portable air quality tracker and weather station. It allows you to analyze personal exposure to air pollution with real-time data, both indoors and outdoors, and create a personal air quality map.

Since there is no unified air quality measurement system for the whole world, the ATMO team has developed their own Air Quality Score based on academic research, National Air Quality Indexes (AQIs), and WHO recommendations. AQS ranges on a scale from 0 (severely polluted air) to 100 (very clean).

Atmotube’s AQS is calculated based on:

PM1, PM2.5 and PM10
VOCs (volatile organic compounds) such as formaldehyde, tetrachloroethylene, acetone, propylene, etc.