tk United States
Ivfl Environmental Protection
I	Agency

Counties with Monitors Violating the 1997 8-Hour Ozone Standard

of 0.08 parts per million (ppm)

1	85 monitored counties violate.

2	Monitored air quality data can be obtained from the
AQS system at http://vwvw.epa.gov/ttn/airs/airsaas/

3 The 1997 national ambient air quality standard (NAAQS)
for ozone of 0.08 ppm is effectively expressed as 0.084
ppm when data handling conventions are applied.

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