One-Hour Ozone High Value Days for 2008
as of December 3

In July 1997, the U. S. Environmental Protection Agency (EPA) announced a new National Ambient Air Quality Standard for ground-level ozone. The EPA is phasing out and replacing the previous one-hour standard with a new eight-hour standard to protect public health against longer exposure to the air pollutant.

A community will meet the new standard when the three-year average of the fourth-highest daily maximum eight-hour concentration measured at each monitoring site is less than 85 parts per billion.

Use the selection boxes below to customize this report. You may select a different year, a different sorting order, or a different report format. Click on the Generate Report button once you have made your selections. All times shown are in 24-hour format and are Local Standard Time. These times correspond to the beginning of the hourly average.

2008 -- Sorted by Maximum Value
Location	Region	CAMS	AQS	Date	Time	Value	POC	Hours Exceeded
There are no one-hour ozone exceedances recorded for 2008.
POC (Parameter Occurrence Code): a code used to correctly separate data from multiple instruments at one site.

PLEASE NOTE: This data has not been verified by the DAQEM and may change. This is the most current data, but it is not official until it has been certified by our technical staff. Data is collected from DAQEM ambient monitoring sites and may include data collected by other outside agencies.

Interpreting the AQI

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.