Daily Maximum Eight-Hour Ozone Averages for November 2009

The table below lists the peak daily maximum eight-hour ozone concentrations measured in November 2009 in each community where the TREX measures ozone. Concentrations that are rated Moderate or higher are color-highlighted based on the EPA-defined Air Quality Index colors. (See Interpreting the AQI.) All ozone measurements are in parts per billion.

Use the selection boxes below to customize this report. You may select a different month, a different year, a different report format, and whether or not to include time on the report. Click on the Generate Report button once you have made your selections.

Month:Year:Report Format: Include time:
Include time
Highlight with AQI colors
AreaMonitoring SitePOCNovember 2009POCMonitoring Site
123456789101112131415161718192021
CT-ME-MA-NH-RI-VT
Penobscot Indian Nation-ME1 N202820262226263537322718152022292623635328NA1Penobscot Indian Nation-ME
Sipayik TAQP-ME11830262529292434453325232732362629272537NA1Sipayik TAQP-ME
AreaMonitoring SitePOCNovember 2009POCMonitoring Site
123456789101112131415161718192021
NJ-NY-PR-VI
Saint Regis Mohawk Tribe-NY12321232424442934523224252020283221183417NA1Saint Regis Mohawk Tribe-NY
AreaMonitoring SitePOCNovember 2009POCMonitoring Site
123456789101112131415161718192021
CA-NV-AZ-HI-AS-GU
Fort McDowell Yuma Frank-AZ1 N434742424636384135413731353940444241NV41NA1Fort McDowell Yuma Frank-AZ
Bishop Paiute Tribe-CA1 N2729283627253130312732342733322626333045NA1Bishop Paiute Tribe-CA
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.
NV - There are not enough valid eight-hour averages for this day (there must be eighteen valid eight-hour averages).
NA - Data not available.
 N - Data from this instrument does not meet EPA quality assurance criteria and cannot be used for regulatory purposes.

Interpreting the AQI

Air Quality Index

Each NAAQS pollutant has a separate AQI scale, with an AQI rating of 100 corresponding to the concentration of the Federal Standard for that pollutant. Additional information about the AQI and how it can be used is available from the EPAExit.

Place your mouse pointer over the scale displayed above to view information about the Air Quality Index, and each of the rating levels.

The actual index calculation is different for each parameter measured and is specified by the EPA. The following table shows the various breakpoints used in calculating the AQI.

AQI Breakpoint Definitions
AQI Range 1hr Ozone
in ppm
8hr Ozone
in ppm
8hr Carbon Monoxide
in ppm
24hr Sulfur Dioxide
in ppm
24hr PM-10
in ug/m3
24hr PM-2.5
in ug/m3
0 - 50 Not Defined 0 - 0.059 0 - 4.4 0 - 0.034 0 - 54 0 - 15.4
51 - 100 Not Defined 0.06 - 0.075 4.5 - 9.4 0.035 - 0.144 55 - 154 15.5 - 40.4
101 - 150 0.125 - 0.164 0.076 - 0.095 9.5 - 12.4 0.145 - 0.224 155 - 254 40.5 - 65.4
151 - 200 0.165 - 0.204 0.096 - 0.115 12.5 - 15.4 0.225 - 0.304 255 - 354 65.5 - 150.4
201 - 300 0.205 - 0.404 0.116 - 0.374 15.5 - 30.4 0.305 - 0.604 355 - 424 150.5 - 250.4
301 - 400 0.405 - 0.504 Not Defined 30.5 - 40.4 0.605 - 0.804 425 - 504 250.5 - 350.4
401 - 500 0.505 - 0.604 Not Defined 40.5 - 50.4 0.805 - 1.004 505 - 604 350.5 - 500.4
500 Not Defined Not Defined Not Defined Not Defined 605 - 4999 500.5 - 999.9

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