US air pollution statistics per county and city in MarylandFind historical and current air pollution values and statistics such as carbon monoxide and nitrogen dioxide levels for all cities and countys of Maryland2005 air pollution stats in Harford Co, Maryland- September 12, 2008 <table><tbody><tr><td>County<td><td>Harford Co<td><tr><tr><td>State<td><td>Maryland<td><tr><tr><td>Data from year<td><td>2005<td><tr><tr><td>Total number of days monitored<td><td>265<td><tr><tr><td>Good air<td><td>196 (73.96%)<td><tr><tr><td>Moderate air<td><td>54...http://pollution.allstats.info/Maryland/Harford-Co/airpollution_2005.aspx 1999 air pollution stats in Prince George's Co, Maryland- September 11, 2008 <table><tbody><tr><td>County<td><td>Prince George's Co<td><tr><tr><td>State<td><td>Maryland<td><tr><tr><td>Data from year<td><td>1999<td><tr><tr><td>Total number of days monitored<td><td>324<td><tr><tr><td>Good air<td><td>240 (74.07%)<td><tr><tr><td>Moderate air<td><td>60...http://pollution.allstats.info/Maryland/Prince-George's-Co/airpollution_1999.aspx 1998 air pollution stats in Carroll Co, Maryland- September 11, 2008 <table><tbody><tr><td>County<td><td>Carroll Co<td><tr><tr><td>State<td><td>Maryland<td><tr><tr><td>Data from year<td><td>1998<td><tr><tr><td>Total number of days monitored<td><td>209<td><tr><tr><td>Good air<td><td>139 (66.51%)<td><tr><tr><td>Moderate air<td><td>52...http://pollution.allstats.info/Maryland/Carroll-Co/airpollution_1998.aspx 2000 air pollution stats in Harford Co, Maryland- September 10, 2008 <table><tbody><tr><td>County<td><td>Harford Co<td><tr><tr><td>State<td><td>Maryland<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>297 (81.15%)<td><tr><tr><td>Moderate air<td><td>57...http://pollution.allstats.info/Maryland/Harford-Co/airpollution_2000.aspx 1997 air pollution stats in Carroll Co, Maryland- September 10, 2008 <table><tbody><tr><td>County<td><td>Carroll Co<td><tr><tr><td>State<td><td>Maryland<td><tr><tr><td>Data from year<td><td>1997<td><tr><tr><td>Total number of days monitored<td><td>207<td><tr><tr><td>Good air<td><td>154 (74.40%)<td><tr><tr><td>Moderate air<td><td>44...http://pollution.allstats.info/Maryland/Carroll-Co/airpollution_1997.aspx |