Nitrogen Oxides Summary Table at Memorial Academy

This page last reviewed October 21, 2010


Month Mean of 1-hour Maximum* (ppb)
October-99 308
November-99 264
December-99 358
January-00 285
February-00 186
March-00 151
April-00 84
May-00 53
June-00 49
July-00  
August-00 57
September-00 117
October-00 106
November-00 247
December-00 276
January-01 269
February-01 189
Maximum 358

*Hourly average concentration of nitrogen oxides is measured continuously. A maximum 1-hour nitrogen oxides measurement is obtained for each day, which is then averaged over a month to calculate the monthly mean of 1-hour maximum nitrogen oxides.


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