AQ Indexes

What is an air quality index (AQI)?

An air quality index (AQI) is the scale by which a certain provider—for example, the U.S. EPA—categorizes different air quality levels, based on different calculation methods, data sources, and designated purposes.

Supported AQIs

The Air Quality API includes over 70 air quality indexes.
Based on the request parameters, for each location and timestamp (up to) two air quality indexes can be returned:

• Universal AQI. This AQI is returned if the universalAqi boolean is set to true.
• A local AQI defined for the requested location. A Local AQI is returned if the LOCAL_AQI extra computation is specified. Note that each supported location may have several local AQIs available and it is possible to modify the default local AQI using the customLocalAqis parameter.

Code	Display Name	Best Value	Worst Value	Categories	Pollutants
and_aire	IQA (AD)	1	5	"Excellent air quality", "Good air quality", "Regular air quality", "Poor air quality", "Bad air quality"	"o3", "pm10", "pm25", "no2", "so2", "co"
aus_combined	AQI (AU)	0	200	"Very good air quality", "Good air quality", "Fair air quality", "Poor air quality", "Very poor air quality", "Hazardous air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
aus_nsw	AQC (AU-NSW)	-	-	"Good air quality", "Fair air quality", "Poor air quality", "Very poor air quality", "Extremely poor air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
aut_umwelt	AQI (AT)	1	5	"1 - Green", "2 - Light green", "3 - Yellow", "4 - Orange", "5 - Red"	"o3", "pm10", "no2", "so2", "co"
aut_vienna	AQI (AT-Vienna)	1	6	"Very good air quality", "Good air quality", "Satisfactory air quality", "Unsatisfactory air quality", "Bad air quality", "Very bad air quality"	"o3", "pm10", "no2", "so2", "co"
uaqi	Universal AQI	100	0	"Excellent air quality", "Good air quality", "Moderate air quality", "Low air quality", "Poor air quality"	"co", "no2", "o3", "pm10", "pm25", "so2"
bel_irceline	BelAQI (BE)	1	10	"Excellent air quality", "Very good air quality", "Good air quality", "Fairly good air quality", "Moderate air quality", "Poor air quality", "Very poor air quality", "Bad air quality", "Very bad air quality", "Horrible air quality"	"pm25", "no2", "o3", "pm10"
bgd_case	AQI (BD)	0	500	"Good air quality", "Moderate air quality", "Caution", "Unhealthy air quality", "Very Unhealthy air quality", "Extremely Unhealthy air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
bgr_niggg	AQI (BG)	1	10	"Low air pollution", "Moderate air pollution", "High air pollution", "Very High air pollution"	"so2", "no2", "pm10", "co", "o3"
bra_saopaulo	AQI (BR)	0	200	"N1 – Good air quality", "N2 – Moderate air quality", "N3 – Bad air quality", "N4 – Very bad air quality", "N5 – Poor air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
can_ec	AQHI (CA)	1	10	"Low health risk", "Moderate health risk", "High health risk", "Very high health risk"	"no2", "o3", "pm25", "pm10"
caqi	CAQI (EU)	0	100	"Very low air pollution", "Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution"	"no2", "o3", "co", "so2", "pm10", "pm25"
che_cerclair	KBI (CH)	-	-	"Low air pollution", "Moderate air pollution", "Evident air pollution", "Considerable air pollution", "High air pollution", "Very high air pollution"	"pm10", "o3", "no2"
chn_mep	AQI (CN)	0	500	"Excellent air quality", "Good air quality", "Light air pollution", "Moderate air pollution", "Heavy air pollution", "Severe air pollution"	"so2", "no2", "co", "o3", "pm10", "pm25"
chn_mep_1h	AQI-1h (CN)	0	500	"Excellent air quality", "Good air quality", "Light air pollution", "Moderate air pollution", "Heavy air pollution", "Severe air pollution"	"so2", "no2", "co", "o3", "pm10", "pm25"
col_rmcab	IBOCA (CO)	0	100	"Fair air quality", "Moderate air quality", "Regular air quality", "Bad air quality", "Very bad air quality", "Hazardous air quality"	"o3", "pm25", "pm10", "co", "so2", "no2"
cri_icca	ICCA (CR)	0	100	"Good air quality", "Unfavorable air quality for sensitive groups", "Unfavorable air quality", "Very unfavorable air quality", "Hazardous air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
cyp_dli	AQI (CY)	1	4	"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution"	"so2", "no2", "co", "o3", "pm10", "pm25", "c6h6"
cze_chmi	AQI (CZ)	-	-	"1A - Very good air quality", "1B - Good air quality", "2A - Acceptable air quality", "2B - Acceptable air quality", "3A - Aggravated air quality", "3B - Bad air quality"	"no2", "o3", "so2", "pm10"
deu_lubw	LuQx (DE)	1	6	"Very good air quality", "Good air quality", "Satisfactory air quality", "Sufficient air quality", "Bad air quality", "Very bad air quality"	"no2", "so2", "co", "o3", "pm10"
deu_uba	LQI (DE)	-	-	"Very good air quality", "Good air quality", "Moderate air quality", "Poor air quality", "Very poor air quality"	"no2", "o3", "pm10"
dnk_aarhus	AQI (DK)	-	-	"Below average air pollution", "Average air pollution", "Above average air pollution", "High air pollution", "Warning level air pollution"	"no2", "co", "o3"
eaqi	EAQI (EU)	-	-	"Good air quality", "Fair air quality", "Moderate air quality", "Poor air quality", "Very poor air quality", "Extremely poor air quality"	"no2", "o3", "so2", "pm10", "pm25"
ecu_quitoambiente	IQCA (EC)	0	500	"Desirable air quality", "Acceptable air quality", "Precautionary level", "Alert level", "Alarm level", "Emergency level"	"co", "o3", "no2", "so2", "pm25", "pm10"
esp_madrid	AQI (ES)	0	150	"Good air quality", "Acceptable air quality", "Poor air quality", "Bad air quality"	"pm10", "co", "no2", "so2", "o3"
esp_miteco	ICA (ES)	-	-	"Good air quality", "Reasonably good air quality", "Regular air quality", "Unfavorable air quality", "Very unfavorable air quality", "Extremely unfavorable air quality"	"pm10", "pm25", "no2", "so2", "o3"
est_ekuk	AQI (EE)	-	-	"Very Good air quality", "Good air quality", "Medium air quality", "Bad air quality", "Very Bad air quality"	"so2", "no2", "co", "o3", "pm10", "pm25", "nh3", "c6h6"
fin_hsy	AQI (FI)	-	-	"Good air quality", "Satisfactory air quality", "Fair air quality", "Poor air quality", "Very poor air quality"	"so2", "no2", "pm10", "pm25", "o3", "co", "trs"
fra_atmo	IQA (FR)	-	-	"Good air quality", "Medium air quality", "Degraded air quality", "Bad air quality", "Very bad air quality", "Extremely bad air quality"	"so2", "no2", "o3", "pm25", "pm10"
gbr_defra	DAQI (UK)	1	10	"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution"	"no2", "o3", "so2", "pm25", "pm10"
gib_gea	AQHI (GI)	1	10	"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution"	"o3", "no2", "so2", "co", "pm10", "pm25"
hkg_epd	AQHI (HK)	1	10	"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution", "Serious air pollution"	"so2", "no2", "o3", "pm25", "pm10"
hrv_azo	AQI (HR)	0	100	"Very low air pollution", "Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution"	"no2", "o3", "co", "so2", "pm10", "pm25"
hun_bler	AQI (HU)	1	10	"Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution"	"no2", "pm10", "so2", "o3", "co"
idn_menlhk	ISPU (ID)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"o3", "pm10", "co", "so2", "no2"
ind_cpcb	NAQI (IN)	0	500	"Good air quality", "Satisfactory air quality", "Moderate air quality", "Poor air quality", "Very poor air quality", "Severe air quality"	"pm10", "pm25", "no2", "o3", "co", "so2", "nh3"
irl_epa	AQIH (IE)	1	10	"Good air quality", "Fair air quality", "Poor air quality", "Very poor air quality"	"o3", "no2", "so2", "pm25", "pm10"
isr_moep	AQI (IL)	100	-400	"Good air quality", "Medium air pollution", "High air pollution", "Very high air pollution"	"o3", "so2", "no2", "nox", "co", "pm10", "pm25"
ita_moniqa	AQI (IT)	0	200	"Good air quality", "Fair air quality", "Moderate air quality", "Poor air quality", "Bad air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
jpn_aeros	AQI (JP)	-	-	"1 - Blue", "2 - Cyan", "3 - Green", "4 - Yellow/Watch", "5 - Orange/Alert", "6 - Red/Alert+"	"so2", "no", "no2", "o3", "nmhc", "pm10", "pm25"
kor_airkorea	CAI (KR)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality"	"pm25", "pm10", "so2", "co", "o3", "no2"
kwt_beatona	KAQI (KW)	0	500	"Very good air quality", "Good air quality", "Moderate air quality", "Bad air quality", "Very bad air quality"	"co", "o3", "no2", "so2", "pm10"
lie_cerclair	KBI (LI)	1	6	"Low air pollution", "Moderate air pollution", "Evident air pollution", "Considerable air pollution", "High air pollution", "Very high air pollution"	"pm10", "o3", "no2"
ltu_gamta	OUI (LT)	1	5	"Very low air pollution", "Low air pollution", "Average air pollution", "High air pollution", "Very high air pollution"	"o3", "pm10", "no2", "so2", "co"
lux_emwelt	AQI (LU)	1	10	"Excellent air quality", "Very good air quality", "Good air quality", "Fairly good air quality", "Moderate air quality", "Poor air quality", "Very poor air quality", "Bad air quality", "Very bad air quality", "Horrible air quality"	"o3", "no2", "no", "co", "so2", "pm10"
mex_cdmx	IMECA (MX)	0	500	"Good air quality", "Regular air quality", "Poor air quality", "Very poor air quality", "Extremely poor air quality", "Hazardous air quality"	"so2", "no2", "pm10", "pm25", "o3", "co"
mex_gto	IMECA (MX-Guanajuato)	-	-	"Good air quality", "Satisfactory air quality", "Unsatisfactory air quality", "Bad air quality", "Very bad air quality"	"so2", "no2", "pm10", "pm25", "o3", "co"
mex_icars	ICARS (MX)	-	-	"Good air quality", "Acceptable air quality", "Poor air quality", "Very poor air quality", "Extremely poor air quality"	"pm25", "pm10", "so2", "co", "o3", "no2"
mkd_moepp	AQI (MK)	-	-	"Very low air pollution", "Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution"	"no2", "o3", "co", "so2", "pm10", "pm25"
mng_eic	AQI (MN)	0	500	"Clean", "Normal", "Low pollution", "Moderate pollution", "High pollution", "Very High pollution"	"o3", "pm10", "pm25", "co", "so2", "no2"
mng_ubgov	AQI (MN-Ulaanbaatar)	0	501	"Clean", "Normal", "Slightly Polluted", "Polluted", "Heavily Polluted", "Seriously Polluted"	"co", "no2", "o3", "so2", "pm10", "pm25"
mys_doe	API (MY)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"co", "no2", "o3", "so2", "pm25", "pm10"
nld_rivm	LKI (NL)	1	11	"Good air quality", "Moderate air quality", "Insufficient air quality", "Bad air quality", "Very bad air quality"	"no2", "pm10", "pm25", "o3"
nor_nilu	AQI (NO)	-	-	"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution"	"pm10", "pm25", "no2", "so2", "o3"
npl_doenv	AQI (NP)	0	500	"Good air quality", "Satisfactory air quality", "Moderately polluted", "Poor air quality", "Very poor air quality", "Severe air quality"	"pm10", "pm25", "no2", "o3", "co", "so2"
nzl_lawa	AQI (NZ)	-	-	"Less than 10% of guideline", "10-33% of guideline", "33-66% of guideline", "66-100% of guideline", "Greater than 100% of guideline"	"pm10", "pm25", "no2", "so2", "o3", "co"
per_infoaire	INCA (PE)	-	-	"Good air quality", "Moderate air quality", "Bad air quality", "Alert threshold"	"o3", "pm10", "pm25", "no2", "so2", "co"
phl_emb	AQI (PH)	0	500	"Good air quality", "Fair air quality", "Unhealthy air quality for sensitive groups", "Very unhealthy air quality", "Acutely unhealthy air quality", "Emergency"	"o3", "pm10", "pm25", "co", "so2", "no2"
pol_gios	AQI (PL)	-	-	"Very good air quality", "Good air quality", "Moderate air quality", "Sufficient air quality", "Bad air quality", "Very bad air quality"	"pm10", "pm25", "o3", "no2", "so2", "c6h6", "co"
prt_qualar	IQar (PT)	-	-	"Very good air quality", "Good air quality", "Moderate air quality", "Low air quality", "Bad air quality"	"pm10", "pm25", "no2", "o3", "so2"
rou_calitateaer	AQI (RO)	1	6	"Excellent air quality", "Very good air quality", "Good air quality", "Moderate air quality", "Bad air quality", "Very bad air quality"	"o3", "pm10", "no2", "so2", "co"
sgp_nea	PSI (SG)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"pm25", "pm10", "so2", "co", "o3", "no2"
srb_sepa	SAQI_11 (RS)	1	5	"Excellent", "Good", "Acceptable", "Polluted", "Very Polluted"	"so2", "no2", "pm10", "pm25", "co", "o3"
svk_shmu	AQI (SK)	-	-	"Very good air quality", "Good air quality", "Moderate air quality", "Bad air quality", "Very bad air quality"	"pm10", "pm25", "co", "no2", "so2", "o3"
tha_pcd	AQI (TH)	0	200	"Excellent air quality", "Satisfactory air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality"	"co", "no2", "o3", "so2", "pm10", "pm25"
tur_havaizleme	HKI (TR)	0	500	"Good air quality", "Moderate air quality", "Unhealthy for sensitive groups air quality", "Unhealthy air quality", "Poor air quality", "Hazardous air quality"	"pm10", "no2", "o3", "co", "so2"
twn_epa	AQI (TW)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality for sensitive groups", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"o3", "pm10", "pm25", "co", "so2", "no2"
usa_epa	AQI (US)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality for sensitive groups", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"o3", "pm10", "pm25", "co", "so2", "no2"
usa_epa_nowcast	AQI (US)	0	500	"Good air quality", "Moderate air quality", "Unhealthy air quality for sensitive groups", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality"	"o3", "pm10", "pm25", "co", "so2", "no2"
vnm_vea	AQI (VN)	0	500	"Good air quality", "Average air quality", "Poor air quality", "Bad air quality", "Very Bad air quality", "Hazardous air quality"	"o3", "co", "so2", "no2", "pm10", "pm25"