| | PM25 24 Hour Average (µg/m3) |
| | The information in this report is based on preliminary data and is subject to change. |
| | 09/14 | 09/15 | 09/16 | 09/17 | 09/18 | 09/19 | 09/20 |
| | San Joaquin |
| | Stockton-University | 9.0 | 10.0 | 7.7 | 6.0 | 13.7 | x | 36.9 | x |
| | Manteca | 11.1 | 9.3 | 9.1 | 6.5 | 3.9 | 13.5 | x | 38.0 | x |
| | Tracy-Airport |
| | Stanislaus |
| | Modesto-14th | 12.6 | 10.5 | 10.6 | 7.5 | 7.2 | 11.9 | 31.7 | x |
| | Turlock | 13.8 | 12.0 | 11.1 | 8.8 | 7.0 | 11.5 | 29.3 | x |
| | Merced |
| | Merced-M St. | 9.8 | 9.0 | 9.1 | 6.9 | 4.9 | 6.0 | 20.0 | x |
| | Merced-Coffee | 8.7 | 8.8 | 8.5 | 6.8 | 5.1 | 6.4 | 19.2 | x |
| | Madera |
| | Madera-City | 12.0 | 13.4 | x | 13.5 | x | 11.7 | 8.9 | 9.0 | 19.6 | x |
| | Madera |
| | Fresno |
| | Fresno-SSP |
| | Clovis | 10.7 | 12.4 | x | 10.9 | 7.9 | 6.1 | 7.5 | 13.7 | x |
| | Fresno-Garland | 9.8 | 12.1 | x | 10.8 | 11.6 | 8.2 | 6.7 | 16.8 | x |
| | Fresno-Foundry | 13.3 | 13.7 | x | 11.4 | 10.0 | 9.2 | 9.5 | 16.0 | x |
| | Fresno-Pacific | 12.8 | 13.4 | x | 11.9 | 9.3 | 7.9 | 8.5 | 15.8 | x |
| | Fresno-Drummond |
| | Parlier |
| | Tranquillity | 4.7 | 7.0 | 7.8 | 7.6 | 3.8 | 4.7 | 14.0 | x |
| | Huron | 6.2 | 9.5 | 9.3 | 7.4 | 6.6 | 6.6 | 10.7 |
| | Kings |
| | Hanford | 11.2 | 14.6 | 11.3 | 8.9 | 9.2 | 9.3 | 18.2 | x |
| | Corcoran | 9.4 | 11.7 | 11.4 | 8.9 | 6.5 | 8.4 | 14.3 | x |
| | Tulare |
| | Visalia-Ashland | 9.8 | 13.7 | x | 13.5 | x | 9.1 | 7.7 | 9.2 | 13.2 | x |
| | Porterville | 10.5 | 12.9 | x | 13.6 | x | 10.5 | 8.4 | 12.0 | x | 13.5 | x |
| | Ash Mountain-SNP | 67.3 | x | 45.3 | x | 35.5 | x | 26.2 | x | 17.2 | x | 44.1 | x | 56.7 | x |
| | Lower Kaweah-SNP |
| | Kern |
| | Shafter |
| | Oildale |
| | Bakersfield-Gold | 12.5 | 14.5 | 13.7 | x | 10.3 | 8.0 | 13.3 | 15.6 | x |
| | Bakersfield-Calif | 12.5 | 14.1 | 11.2 | 9.4 | 5.9 | 9.7 | 13.1 | x |
| | Bakersfield-Muni |
| | Edison |
| | Arvin-DiGiorgio |
| | Maricopa |
| | Lebec | 5.5 | 7.7 | 6.1 | 8.3 | 8.4 | 9.8 | 11.0 |
| | District Maximum | 67.3 | | 45.3 | | 35.5 | | 26.2 | | 17.2 | | 44.1 | | 56.7 |
| | Maximum Measured | Unofficial Days Over the Federal and State Standards¹ |
| | Value for This Year |
| | Pollutant | Maximum | Federal 2015 8-Hr Ozone | 57 | | Federal 1997 24-hr PM2.5 | 0 |
| | Federal 2008 8-Hr Ozone | 35 | | Federal 24-hr PM10 | 0 |
| | O3-1hr (ppb) | 109 | | Federal 1997 8-Hr Ozone | 9 | | State 1-Hr Ozone | 15 |
| | O3-8hr (ppb) | 93 | | Federal 1-Hr Ozone | 0 | | State 1997 8-Hr Ozone | 57 |
| | PM 10 (µg/m³) | 144 | | Federal 2006 24-hr PM2.5 | 3 | | State 24-hr PM10 | 108 |
| | PM 2.5 (µg/m³) | 40.6 |
| ¹Data affected by smoke, high winds, fireworks, and etc. and which exceeded a federal standard are denoted with |
| an ‘x’ in the table above. Values marked with an ‘x’ are not included in the tallies above. |
| Make one change for clean air! Visit www.healthyairliving.com and become a part of the solution! |
| Thursday, September 21, 2023 | Page 1 of 1 |