Minnesota air pollution stats

County	First data available	Last data available
Anoka Co	1997	2007
Becker Co	2005	2007
Beltrami Co	1998	1999
Carlton Co	1997	2007
Cass Co	2003	2007
Clay Co	1998	1999
Cook Co	2006	2007
Crow Wing Co	2000	2007
Dakota Co	1997	2007
Douglas Co	1997	2001
Freeborn Co	1999	2001
Goodhue Co	1997	2006
Hennepin Co	1997	2007
Itasca Co	2000	2001
Kandiyohi Co	2000	2003
Koochiching Co	1997	2000
Lake Co	1997	2007
Lyon Co	2005	2007
McLeod Co	1999	2000
Mille Lacs Co	1997	2007
Morrison Co	1997	1997
Nicollet Co	2000	2001
Olmsted Co	1997	2007
Otter Tail Co	1997	2000
Pine Co	1997	2002
Pipestone Co	1997	1997
Ramsey Co	1997	2007
Rock Co	2002	2005
Roseau Co	1997	1998
Scott Co	2000	2007
Sherburne Co	1997	1998
St. Louis Co	1997	2007
Stearns Co	1997	2007
Swift Co	1998	1999
Washington Co	1997	2007
Winona Co	1998	2005
Wright Co	1997	2007
Yellow Medicine Co	1997	1998