VariablesVariables (legacy): Ozone Time (EDT) Label: Ozone Time (EDT) Definition: Time of Ozone concentration observation Type: Date/time Date format: MM/DD/YYYY h:m Missing values: None specified , Ozone (ppb) Label: Ozone (ppb) Definition: ozone concentrations measured in part per billion Type: Physical quantity Unit: Parts per billion (ppb) Maximum: Not specified Minimum: Not specified Precision: Not specified Missing values: None specified