|  | Detroit | Grand Rapids |
---|---|---|---|
CAPs mass | μg/m3 | 542 | 519 |
Organic carbon | μg/m3 | 177 | 280 |
Elementary carbon | μg/m3 | 4 | 7 |
Sulfate | μg/m3 | 216 | 58 |
Nitrate | μg/m3 | 19 | 23 |
Ammonium | μg/m3 | 48 | 51 |
Mg | ng/mg3 | 580 | 770 |
Al | ng/mg3 | 762 | 608 |
Ca | ng/mg3 | 1557 | 2365 |
V | ng/mg3 | 22 | 6 |
Mn | ng/mg3 | 108 | 236 |
Fe | ng/mg3 | 2760 | 3410 |
Ni | ng/mg3 | 9 | 10 |
Cu | ng/mg3 | 64 | 228 |
Zn | ng/mg3 | 594 | 438 |
Se | ng/mg3 | 141 | 61 |
Rb | ng/mg3 | 3.4 | 4.2 |
Mo | ng/mg3 | 4.6 | 5.2 |
Cd | ng/mg3 | 2.3 | 1.9 |
Ba | ng/mg3 | 7.0 | 25.1 |
La | ng/mg3 | 2.0 | 1.1 |
Ce | ng/mg3 | 3.0 | 3.7 |
Pb | ng/mg3 | 107 | 49 |
Ambient gaseous pollutants | |||
CO | ppm | 0.6 | 1.2 |
SO2 | ppb | 29 | 2 |
NO | ppb | 9 | 14 |
NO2 | ppb | 22 | 15 |