rowid,muni_id,county_fips,county_name,state,year,days_with_aqi,good_days,moderate_days,days_unhealthy,max_aqi,p90_aqi,median_aqi,source_url,data_license,updated_at
1,1,06085,Santa Clara,CA,2022,365,188,172,5,119,73,49,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
2,1,06085,Santa Clara,CA,2023,365,240,121,4,134,63,43,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
3,1,06085,Santa Clara,CA,2024,363,201,161,1,111,63,47,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
4,3,17031,Cook,IL,2022,365,117,240,8,151,76,54,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
5,3,17031,Cook,IL,2023,365,104,227,34,223,93,57,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
6,3,17031,Cook,IL,2024,366,131,224,11,166,84,54,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
7,4,53033,King,WA,2022,365,216,130,19,237,77,46,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
8,4,53033,King,WA,2023,365,214,145,6,165,63,46,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
9,4,53033,King,WA,2024,366,255,108,3,119,61,41,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
10,5,42101,Philadelphia,PA,2022,365,155,206,4,113,71,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
11,5,42101,Philadelphia,PA,2023,365,83,268,14,331,84,58,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
12,5,42101,Philadelphia,PA,2024,366,173,183,10,136,77,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
13,7,55079,Milwaukee,WI,2022,365,192,167,6,143,70,49,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-07-29 00:36:51
14,7,55079,Milwaukee,WI,2023,365,166,180,19,250,82,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-07-29 00:36:51
15,7,55079,Milwaukee,WI,2024,366,251,109,6,147,65,43,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-07-29 00:36:51
16,10,12086,Miami-Dade,FL,2022,365,259,104,2,136,59,44,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
17,10,12086,Miami-Dade,FL,2023,365,207,155,3,170,63,48,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
18,10,12086,Miami-Dade,FL,2024,366,219,143,4,197,61,48,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
19,15,08031,Denver,CO,2022,365,161,197,7,112,77,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
20,15,08031,Denver,CO,2023,365,131,228,6,179,77,54,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
21,15,08031,Denver,CO,2024,366,129,208,29,172,93,55,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
22,16,48029,Bexar,TX,2022,365,116,236,13,214,80,55,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
23,16,48029,Bexar,TX,2023,365,164,189,12,309,79,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
24,16,48029,Bexar,TX,2024,366,174,170,22,199,87,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
25,17,48121,Denton,TX,2022,365,209,136,20,187,87,47,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
26,17,48121,Denton,TX,2023,365,200,133,32,177,93,49,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
27,17,48121,Denton,TX,2024,366,210,128,28,187,87,47,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
28,19,48141,El Paso,TX,2022,365,72,273,20,163,86,59,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
29,19,48141,El Paso,TX,2023,365,69,277,19,155,90,64,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
30,19,48141,El Paso,TX,2024,366,81,222,63,431,112,67,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
31,36,04013,Maricopa,AZ,2022,365,27,242,96,264,136,75,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
32,36,04013,Maricopa,AZ,2023,365,41,256,68,183,119,72,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
33,36,04013,Maricopa,AZ,2024,366,33,260,73,261,113,77,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
34,40,39049,Franklin,OH,2022,365,206,157,2,143,67,48,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
35,40,39049,Franklin,OH,2023,365,136,218,11,210,77,54,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
36,40,39049,Franklin,OH,2024,366,151,211,4,118,72,53,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
37,48,25025,Suffolk,MA,2022,365,261,102,2,112,60,41,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
38,48,25025,Suffolk,MA,2023,365,231,134,0,99,62,44,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
39,48,25025,Suffolk,MA,2024,366,291,75,0,78,57,36,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
40,51,12103,Pinellas,FL,2022,365,226,139,0,87,58,46,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
41,51,12103,Pinellas,FL,2023,365,217,145,3,113,62,47,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
42,51,12103,Pinellas,FL,2024,360,213,144,3,132,60,48,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
43,52,12011,Broward,FL,2022,365,197,168,0,100,61,49,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
44,52,12011,Broward,FL,2023,365,158,204,3,109,66,52,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
45,52,12011,Broward,FL,2024,366,213,152,1,154,61,47,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
46,55,48201,Harris,TX,2022,365,57,281,27,179,93,60,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
47,55,48201,Harris,TX,2023,365,44,273,48,205,121,64,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
48,55,48201,Harris,TX,2024,366,50,269,47,201,108,61,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2024.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
49,56,06037,Los Angeles,CA,2022,365,17,254,94,209,140,74,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2022.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39
50,56,06037,Los Angeles,CA,2023,365,41,237,87,210,147,67,https://aqs.epa.gov/aqsweb/airdata/annual_aqi_by_county_2023.zip,US EPA — PUBLIC DOMAIN (safe for CC-BY public dataset + commercial),2026-08-01 08:17:39