Ventilation Index

Ventilation Interactive mapThe daily Smoke Control Forecast contains predictions of the Ventilation Index, a measure of atmospheric turbulence and low level winds, for 25 B.C. locations.

The burning of woody debris outdoors is only permitted when the forecast Ventilation Index is sufficient to disperse smoke. Before debris can be ignited, the Ventilation Index must be predicted to be both GOOD (55-100) this afternoon as well as FAIR or GOOD (34-100) tomorrow afternoon. Additional rules on outdoor burning are in the Open Burning Smoke Control Regulation.


The data and information displayed on this site has been collected on a near "real time" basis by automated monitors. It is preliminary in nature and has not yet been tested or verified. Therefore, it may be subject to change, without notice, pending subsequent review and verification. At this time, it is provided as a "public service" on an "as is" basis without warranty, whether express or implied, as to its quality, accuracy, suitability, reliability, usability, completeness, timeliness or applicability for particular purposes. The application of quality assurance and verification procedures to the data and information may result in differences between what is currently displayed and what will become the official record.