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_aireIQA (AD)15"Excellent air quality", "Good air quality", "Regular air quality", "Poor air quality", "Bad air quality""o3", "pm10", "pm25", "no2", "so2", "co"
aus_combinedAQI (AU)0200"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_nswAQC (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_umweltAQI (AT)15"1 - Green", "2 - Light green", "3 - Yellow", "4 - Orange", "5 - Red""o3", "pm10", "no2", "so2", "co"
aut_viennaAQI (AT-Vienna)16"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"
uaqiUniversal AQI1000"Excellent air quality", "Good air quality", "Moderate air quality", "Low air quality", "Poor air quality""co", "no2", "o3", "pm10", "pm25", "so2"
bel_ircelineBelAQI (BE)110"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_caseAQI (BD)0500"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_nigggAQI (BG)110"Low air pollution", "Moderate air pollution", "High air pollution", "Very High air pollution""so2", "no2", "pm10", "co", "o3"
bra_saopauloAQI (BR)0200"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_ecAQHI (CA)110"Low health risk", "Moderate health risk", "High health risk", "Very high health risk""no2", "o3", "pm25", "pm10"
caqiCAQI (EU)0100"Very low air pollution", "Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution""no2", "o3", "co", "so2", "pm10", "pm25"
che_cerclairKBI (CH)--"Low air pollution", "Moderate air pollution", "Evident air pollution", "Considerable air pollution", "High air pollution", "Very high air pollution""pm10", "o3", "no2"
chn_mepAQI (CN)0500"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_1hAQI-1h (CN)0500"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_rmcabIBOCA (CO)0100"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_iccaICCA (CR)0100"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_dliAQI (CY)14"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution""so2", "no2", "co", "o3", "pm10", "pm25", "c6h6"
cze_chmiAQI (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_lubwLuQx (DE)16"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_ubaLQI (DE)--"Very good air quality", "Good air quality", "Moderate air quality", "Poor air quality", "Very poor air quality""no2", "o3", "pm10"
dnk_aarhusAQI (DK)--"Below average air pollution", "Average air pollution", "Above average air pollution", "High air pollution", "Warning level air pollution""no2", "co", "o3"
eaqiEAQI (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_quitoambienteIQCA (EC)0500"Desirable air quality", "Acceptable air quality", "Precautionary level", "Alert level", "Alarm level", "Emergency level""co", "o3", "no2", "so2", "pm25", "pm10"
esp_madridAQI (ES)0150"Good air quality", "Acceptable air quality", "Poor air quality", "Bad air quality""pm10", "co", "no2", "so2", "o3"
esp_mitecoICA (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_ekukAQI (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_hsyAQI (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_atmoIQA (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_defraDAQI (UK)110"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution""no2", "o3", "so2", "pm25", "pm10"
gib_geaAQHI (GI)110"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution""o3", "no2", "so2", "co", "pm10", "pm25"
hkg_epdAQHI (HK)110"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution", "Serious air pollution""so2", "no2", "o3", "pm25", "pm10"
hrv_azoAQI (HR)0100"Very low air pollution", "Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution""no2", "o3", "co", "so2", "pm10", "pm25"
hun_blerAQI (HU)110"Low air pollution", "Medium air pollution", "High air pollution", "Very high air pollution""no2", "pm10", "so2", "o3", "co"
idn_menlhkISPU (ID)0500"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality""o3", "pm10", "co", "so2", "no2"
ind_cpcbNAQI (IN)0500"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_epaAQIH (IE)110"Good air quality", "Fair air quality", "Poor air quality", "Very poor air quality""o3", "no2", "so2", "pm25", "pm10"
isr_moepAQI (IL)100-400"Good air quality", "Medium air pollution", "High air pollution", "Very high air pollution""o3", "so2", "no2", "nox", "co", "pm10", "pm25"
ita_moniqaAQI (IT)0200"Good air quality", "Fair air quality", "Moderate air quality", "Poor air quality", "Bad air quality""co", "no2", "o3", "so2", "pm10", "pm25"
jpn_aerosAQI (JP)--"1 - Blue", "2 - Cyan", "3 - Green", "4 - Yellow/Watch", "5 - Orange/Alert", "6 - Red/Alert+""so2", "no", "no2", "o3", "nmhc", "pm10", "pm25"
kor_airkoreaCAI (KR)0500"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality""pm25", "pm10", "so2", "co", "o3", "no2"
kwt_beatonaKAQI (KW)0500"Very good air quality", "Good air quality", "Moderate air quality", "Bad air quality", "Very bad air quality""co", "o3", "no2", "so2", "pm10"
lie_cerclairKBI (LI)16"Low air pollution", "Moderate air pollution", "Evident air pollution", "Considerable air pollution", "High air pollution", "Very high air pollution""pm10", "o3", "no2"
ltu_gamtaOUI (LT)15"Very low air pollution", "Low air pollution", "Average air pollution", "High air pollution", "Very high air pollution""o3", "pm10", "no2", "so2", "co"
lux_emweltAQI (LU)110"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_cdmxIMECA (MX)0500"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_gtoIMECA (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_icarsICARS (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_moeppAQI (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_eicAQI (MN)0500"Clean", "Normal", "Low pollution", "Moderate pollution", "High pollution", "Very High pollution""o3", "pm10", "pm25", "co", "so2", "no2"
mng_ubgovAQI (MN-Ulaanbaatar)0501"Clean", "Normal", "Slightly Polluted", "Polluted", "Heavily Polluted", "Seriously Polluted""co", "no2", "o3", "so2", "pm10", "pm25"
mys_doeAPI (MY)0500"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality""co", "no2", "o3", "so2", "pm25", "pm10"
nld_rivmLKI (NL)111"Good air quality", "Moderate air quality", "Insufficient air quality", "Bad air quality", "Very bad air quality""no2", "pm10", "pm25", "o3"
nor_niluAQI (NO)--"Low air pollution", "Moderate air pollution", "High air pollution", "Very high air pollution""pm10", "pm25", "no2", "so2", "o3"
npl_doenvAQI (NP)0500"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_lawaAQI (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_infoaireINCA (PE)--"Good air quality", "Moderate air quality", "Bad air quality", "Alert threshold""o3", "pm10", "pm25", "no2", "so2", "co"
phl_embAQI (PH)0500"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_giosAQI (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_qualarIQar (PT)--"Very good air quality", "Good air quality", "Moderate air quality", "Low air quality", "Bad air quality""pm10", "pm25", "no2", "o3", "so2"
rou_calitateaerAQI (RO)16"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_neaPSI (SG)0500"Good air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality", "Hazardous air quality""pm25", "pm10", "so2", "co", "o3", "no2"
srb_sepaSAQI_11 (RS)15"Excellent", "Good", "Acceptable", "Polluted", "Very Polluted""so2", "no2", "pm10", "pm25", "co", "o3"
svk_shmuAQI (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_pcdAQI (TH)0200"Excellent air quality", "Satisfactory air quality", "Moderate air quality", "Unhealthy air quality", "Very unhealthy air quality""co", "no2", "o3", "so2", "pm10", "pm25"
tur_havaizlemeHKI (TR)0500"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_epaAQI (TW)0500"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_epaAQI (US)0500"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_nowcastAQI (US)0500"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_veaAQI (VN)0500"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"