| Historic (1865-12-01 to
2009-12-20) |
| Rank |
Entity Name |
Count |
Score |
Coref./Ref. |
| 1 |
NO2
|
714 |
5419.8 |
  |
| 2 |
sulfur
|
462 |
3077.1 |
  |
| 3 |
O3
|
371 |
3008.3 |
  |
| 4 |
CO
|
411 |
2520.0 |
  |
| 5 |
NOx
|
277 |
2379.9 |
  |
| 6 |
PM10
|
264 |
2215.0 |
  |
| 7 |
NO
|
236 |
1617.6 |
  |
| 8 |
dioxide
|
177 |
1447.8 |
  |
| 9 |
CO2
|
177 |
1138.9 |
  |
| 10 |
ozone
|
156 |
1109.7 |
  |
| 11 |
oxygen
|
225 |
981.0 |
  |
| 12 |
nitrogen
|
182 |
960.9 |
  |
| 13 |
H2S
|
95 |
949.2 |
  |
| 14 |
SO4
|
93 |
880.0 |
  |
| 15 |
O2
|
122 |
862.9 |
  |
|
| 10 years (1999-12-23 to
2009-12-20) |
| Rank |
Entity Name |
Count |
Score |
Coref./Ref. |
| 1 |
NO2
|
393 |
2913.5 |
  |
| 2 |
O3
|
226 |
1748.2 |
  |
| 3 |
CO
|
293 |
1615.7 |
  |
| 4 |
sulfur
|
250 |
1601.0 |
  |
| 5 |
PM10
|
205 |
1589.4 |
  |
| 6 |
NOx
|
197 |
1573.8 |
  |
| 7 |
NO
|
209 |
1297.6 |
  |
| 8 |
CO2
|
119 |
722.8 |
  |
| 9 |
PM2.5
|
76 |
664.5 |
  |
| 10 |
dioxide
|
75 |
592.7 |
  |
| 11 |
SO4
|
65 |
579.6 |
  |
| 12 |
NH3
|
69 |
572.5 |
  |
| 13 |
H2S
|
57 |
529.0 |
  |
| 14 |
nitrogen
|
106 |
514.2 |
  |
| 15 |
ozone
|
72 |
493.4 |
  |
|
|