US air pollution statistics per county and city in MassachusettsFind historical and current air pollution values and statistics such as carbon monoxide and nitrogen dioxide levels for all cities and countys of Massachusetts1998 air pollution stats in Hampden Co, Massachusetts- September 14, 2008 <table><tbody><tr><td>County<td><td>Hampden Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>1998<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>330 (90.41%)<td><tr><tr><td>Moderate air<td><td>30...http://pollution.allstats.info/Massachusetts/Hampden-Co/airpollution_1998.aspx 2001 air pollution stats in Hampden Co, Massachusetts- September 13, 2008 <table><tbody><tr><td>County<td><td>Hampden Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2001<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>236 (64.66%)<td><tr><tr><td>Moderate air<td><td>116...http://pollution.allstats.info/Massachusetts/Hampden-Co/airpollution_2001.aspx 2006 air pollution stats in Norfolk Co, Massachusetts- September 13, 2008 <table><tbody><tr><td>County<td><td>Norfolk Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2006<td><tr><tr><td>Total number of days monitored<td><td>346<td><tr><tr><td>Good air<td><td>302 (87.28%)<td><tr><tr><td>Moderate air<td><td>42...http://pollution.allstats.info/Massachusetts/Norfolk-Co/airpollution_2006.aspx 1997 air pollution stats in Middlesex Co, Massachusetts- September 13, 2008 <table><tbody><tr><td>County<td><td>Middlesex Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>1997<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>330 (90.41%)<td><tr><tr><td>Moderate air<td><td>28...http://pollution.allstats.info/Massachusetts/Middlesex-Co/airpollution_1997.aspx 2005 air pollution stats in Bristol Co, Massachusetts- September 12, 2008 <table><tbody><tr><td>County<td><td>Bristol Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2005<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>297 (81.37%)<td><tr><tr><td>Moderate air<td><td>66...http://pollution.allstats.info/Massachusetts/Bristol-Co/airpollution_2005.aspx 1999 air pollution stats in Hampshire Co, Massachusetts- September 12, 2008 <table><tbody><tr><td>County<td><td>Hampshire Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>1999<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>319 (87.40%)<td><tr><tr><td>Moderate air<td><td>35...http://pollution.allstats.info/Massachusetts/Hampshire-Co/airpollution_1999.aspx 2002 air pollution stats in Worcester Co, Massachusetts- September 11, 2008 <table><tbody><tr><td>County<td><td>Worcester Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2002<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>265 (72.60%)<td><tr><tr><td>Moderate air<td><td>89...http://pollution.allstats.info/Massachusetts/Worcester-Co/airpollution_2002.aspx 2000 air pollution stats in Suffolk Co, Massachusetts- September 11, 2008 <table><tbody><tr><td>County<td><td>Suffolk Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2000<td><tr><tr><td>Total number of days monitored<td><td>366<td><tr><tr><td>Good air<td><td>214 (58.47%)<td><tr><tr><td>Moderate air<td><td>152...http://pollution.allstats.info/Massachusetts/Suffolk-Co/airpollution_2000.aspx 2003 air pollution stats in Suffolk Co, Massachusetts- September 11, 2008 <table><tbody><tr><td>County<td><td>Suffolk Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>2003<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>202 (55.34%)<td><tr><tr><td>Moderate air<td><td>155...http://pollution.allstats.info/Massachusetts/Suffolk-Co/airpollution_2003.aspx 1999 air pollution stats in Essex Co, Massachusetts- September 11, 2008 <table><tbody><tr><td>County<td><td>Essex Co<td><tr><tr><td>State<td><td>Massachusetts<td><tr><tr><td>Data from year<td><td>1999<td><tr><tr><td>Total number of days monitored<td><td>365<td><tr><tr><td>Good air<td><td>314 (86.03%)<td><tr><tr><td>Moderate air<td><td>42...http://pollution.allstats.info/Massachusetts/Essex-Co/airpollution_1999.aspx |