Average Lead (TSP) (micrograms per cubic meter)
|
U.S.
|
Michigan
|
Midland County
|
|
2004
|
0.0822
|
0.0111
|
0.0086
|
|
2005
|
0.05
|
0.0121
|
0.0077
|
|
2006
|
0.0497
|
0.0104
|
0.0065
|
|
2007
|
0.0587
|
0.008
|
0.0041
|
|
2008
|
0.0694
|
0.0171
|
0.0185
|
|
2009
|
0.0158
|
0.0226
|
0.0128
|
Source: USA.com www.usa.com
| Average Lead (TSP) (micrograms per cubic meter) |
Environment