Local Data Search
A total of 58 results found. Show Results on Map.
| Rank | Air Quality Index ▼ | County / Population |
| 1. | 69.2 | Madera, CA / 152,452 |
| 2. | 67.9 | Tulare, CA / 451,108 |
| 3. | 67.1 | Kern, CA / 857,730 |
| 4. | 67.0 | Mariposa, CA / 17,946 |
| 5. | 62.7 | Kings, CA / 151,390 |
| 6. | 61.0 | Merced, CA / 261,609 |
| 7. | 60.5 | Fresno, CA / 948,844 |
| 8. | 60.3 | Los Angeles, CA / 9,974,203 |
| 9. | 58.7 | Tuolumne, CA / 54,347 |
| 10. | 58.0 | Nevada, CA / 98,606 |
| 11. | 56.3 | Sierra, CA / 3,019 |
| 12. | 54.0 | Mono, CA / 14,193 |
| 13. | 52.4 | San Bernardino, CA / 2,078,586 |
| 14. | 52.3 | Orange, CA / 3,086,331 |
| 15. | 51.3 | Sacramento, CA / 1,450,277 |
| 16. | 51.0 | Stanislaus, CA / 522,794 |
| 17. | 49.4 | San Diego, CA / 3,183,143 |
| 18. | 49.0 | Riverside, CA / 2,266,899 |
| 19. | 48.6 | Yuba, CA / 73,059 |
| 19. | 48.6 | El Dorado, CA / 181,465 |
| 21. | 46.6 | San Joaquin, CA / 701,050 |
| 22. | 46.5 | Calaveras, CA / 44,921 |
| 23. | 46.4 | Alpine, CA / 1,202 |
| 24. | 46.0 | Imperial, CA / 177,026 |
| 25. | 45.6 | Inyo, CA / 18,439 |
| 26. | 45.5 | Butte, CA / 221,578 |
| 27. | 44.1 | Placer, CA / 361,518 |
| 28. | 43.9 | Amador, CA / 37,159 |
| 29. | 43.3 | Santa Clara, CA / 1,841,569 |
| 30. | 42.5 | Glenn, CA / 28,019 |
| 31. | 42.2 | Lassen, CA / 33,356 |
| 32. | 42.1 | Plumas, CA / 19,286 |
| 33. | 42.0 | Santa Barbara, CA / 431,555 |
| 34. | 41.2 | Yolo, CA / 204,162 |
| 35. | 41.1 | Modoc, CA / 9,335 |
| 36. | 40.9 | Tehama, CA / 63,284 |
| 37. | 40.5 | Ventura, CA / 835,790 |
| 38. | 40.4 | Solano, CA / 421,624 |
| 38. | 40.4 | Contra Costa, CA / 1,081,232 |
| 40. | 39.9 | San Benito, CA / 56,888 |
| 41. | 39.5 | Shasta, CA / 178,520 |
| 42. | 39.4 | Colusa, CA / 21,424 |
| 43. | 38.5 | Sutter, CA / 95,067 |
| 43. | 38.5 | Alameda, CA / 1,559,308 |
| 45. | 38.3 | Santa Cruz, CA / 267,203 |
| 46. | 37.5 | Siskiyou, CA / 44,261 |
| 46. | 37.5 | Trinity, CA / 13,515 |
| 48. | 36.8 | San Francisco, CA / 829,072 |
| 49. | 36.5 | Marin, CA / 256,802 |
| 50. | 35.8 | Del Norte, CA / 28,066 |
| 51. | 35.5 | Monterey, CA / 424,927 |
| 52. | 35.3 | San Mateo, CA / 739,837 |
| 53. | 34.4 | Lake, CA / 64,209 |
| 54. | 34.3 | Napa, CA / 139,253 |
| 55. | 33.4 | San Luis Obispo, CA / 274,184 |
| 56. | 33.0 | Humboldt, CA / 134,876 |
| 57. | 30.5 | Sonoma, CA / 491,790 |
| 58. | 29.1 | Mendocino, CA / 87,612 |
Please note that we only rank locations with 'Air Quality Index' data. The rank above might not be a complete list. Locations without 'Air Quality Index' data are not listed.