| Mortality category* | Fresno | Kern | Riverside | Sacramento | San Diego | Santa Clara |
| All-cause, all modifiers | 13.4 | 11.4 | 28.8 | 22.0 | 49.5 | 21.3 |
| Total cardiovascular | 5.8 | 5.1 | 13.2 | 9.3 | 20.3 | 8.7 |
| Male | 2.7 | 2.5 | 6.5 | 4.4 | 9.6 | 4.1 |
| Female | 3.1 | 2.6 | 6.7 | 4.9 | 10.7 | 4.6 |
| White | 4.2 | 4.0 | 11.0 | 7.2 | 16.5 | 6.4 |
| Black | 0.3 | 0.3 | 0.6 | 0.8 | 0.9 | 0.2 |
| Hispanic | 0.9 | 0.7 | 1.2 | 0.5 | 1.9 | 0.9 |
| High school graduate | 3.4 | 2.9 | 9.4 | 6.7 | 15.2 | 6.3 |
| Not high school graduate | 2.2 | 2.1 | 3.4 | 2.4 | 4.4 | 2.3 |
| County characteristics | ||||||
| Population (1000s) | 799 | 662 | 1545 | 1223 | 2814 | 1683 |
| Mean PM2.5 (µg/m3) | 17.5 | 19.5 | 27.1 | 12.6 | 15.3 | 13.9 |
| Mean temp (oF) | 64.2 | 65.7 | 65.5 | 61.8 | 61.9 | 59.5 |
| Mean humidity (%) | 56.5 | 58.2 | 62.6 | 66.1 | 75.8 | 68.3 |
| Observations | 355 | 281 | 279 | 395 | 243 | 317 |
PM, particulate matter.
*Some columns do not add up due to rounding, omitted subgroups (Asians or “other”) or definitions (ie, high school graduation is based on status of those aged ⩾25).