What are the specific Title 17 criteria used?

The criteria are based on a meteorological value called 500-millibar (mb) heights.

  • The height values are obtained from 500-mb forecast weather charts.
  • 500-mb heights typically average 18,300 feet above sea level.
  • High 500-mb heights are related to sinking air through the air column, which tends to be more stable.
  • Stability is a measure of the atmosphere’s ability to lift smoke away from the ground. A more stable atmosphere indicates less plume rise, whereas an unstable atmosphere suggests good conditions for plume rise.

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1. How are burn days decided?
2. What are the specific Title 17 criteria used?
3. How are the criteria used to determine a no burn day?
4. Why are rainy days generally burn days?
5. When can I burn?