Dispersion conditions describe the ability of the atmosphere to spread about and dilute the material.
Conditions in the "Excellent (6)" to "Moderately Good (4)" range are generally safe to perform spray applications. "Moderately Poor" conditions might be acceptable if the wind direction were such that it would carry the particulates away from areas of concern. With winds blowing toward areas of concern, it is best to avoid "Moderately Poor" conditions. When dispersion conditions are "Poor (2)" to "Very Poor (1)," spray applications should be avoided.
