| Overall means | SF | GSP | GWB | P-value |
---|---|---|---|---|---|
PM2.5 (μg/m3) | 20 | 13 (7–24) | 21 (9–50) | 31 (11–45) | < 0.01 |
PM10 (μg/m3) | 26 | 16 (6–29) | 26 (17–48) | 38 (21–50) | < 0.01 |
PM2.5 EC (μg/m3) | 2.0 | 0.6 (0.0–1.7) | 1.7 (0.1–3.3) | 5.3 (0.1–13.2) | < 0.01 |
PM10 EC (μg/m3) | 2.6 | 0.9 (0.1–2.5) | 2.3 (0.0–7.2) | 6.6 (2.2–15.7) | < 0.01 |
BC (μg/m3) | 3.3 | 1.5 (0.2–3.6) | 2.8 (1.3–4.1) | 7.2 (4.1–10.9) | < 0.01 |
PM2.5 OC (μg/m3) | 13.9 | 10 (4–20) | 13 (8–20) | 21 (12–29) | < 0.01 |
Ozone (ppm)a | 0.05 | 0.04 (0.02–0.06) | 0.04 (0.01–0.06) | 0.04 (0.02–0.06) | 0.92 |
Temperature (°F)b | 74 | 71 (50–81) | 75 (66.87) | 75 (70–91) | 0.24 |
Relative humidity (%)b | 72 | 69 (47–95) | 79 (56–97) | 65 (49–84) | 0.03 |