TEELs Definitions
TEEL-0
The threshold concentration below which most people will experience no appreciable risk of health effects.
TEEL-1
The maximum concentration in air below which it is believed nearly all individuals could be exposed without experiencing other than mild transient adverse health effects or perceiving a clearly defined objectionable odor.
TEEL-2
The maximum concentration in air below which it is believed nearly all individuals could be exposed without experiencing or developing irreversible or other serious health effects or symptoms that could impair their abilities to take protective action.
TEEL-3
The maximum concentration in air below which it is believed nearly all individuals could be exposed without experiencing or developing life-threatening health effects.
It is recommended that for application of TEELs, the concentration at the receptor point of interest be calculated as the peak 15-minute time-weighted average concentration.
For information on TEEL values for specific chemicals, visit either the Department of Energy TEEL data tables or the searchable TEEL database.