Non-attainment

Do Your Share For Cleaner Air

EPA Pollution Standard Index-

Good               0-60  ppb
Moderate          61-119 ppb
Unhealthful      120-199 ppb
Very Unhealthful 200-399 ppb
Hazardous        400+    ppb
  

The Environmental Protection Agency (EPA) standard is 120 ppb. Austin exceed the standard in six of the 20 years between 1974 and 1994. In 1994, Austin had 15 ozone actin days where the pollution standard index was Moderate. In 1995, we had 29 days. The Austin Season is April thru October.

Conducive weather conditions:

• 90 degrees or higher
• clear to partly cloudy skies
• little or no wind