Spare the Air
MTC works with the Bay Area Air Quality Management District (Air District) to reduce driving on days when seasonal weather affects the air quality.
On hot, windless summer days and still winter nights, pollution in the air gets trapped over the Bay Area, creating unhealthy air that can be dangerous for people to breathe. That’s how seasonal weather increases the impact of air pollution from activities like driving.
The Spare the Air program provides advance notice when air quality is expected to be unhealthy — so we can all take action to reduce air pollution when it’s most likely to do harm.
How to Make a Difference
MTC and the Air District encourage residents to reduce driving on Spare the Air days and to make clean air choices every day by:
- Walking and biking more often
- Riding transit
- Reducing energy consumption at home
Ozone pollution (known as smog) can become a health problem during the summer months. The Air District issues Spare the Air Alerts on days when ozone levels are forecast to be unhealthy, particularly for young children, seniors and those with respiratory and heart conditions.
Residents are urged to drive less and to reduce the use of ozone-forming pollutants. Those who are particularly sensitive to unhealthy air are advised to limit their time outdoors, especially in the afternoon.
During the winter months, pollution from particulate matter (sometimes known as soot) can reach unhealthy levels in the Bay Area.
On days when particulate levels are forecast to be high, the Air District issues a Winter Spare the Air Alert, making wood burning illegal throughout the Bay Area. On these days, residents (particularly those with respiratory conditions) are advised to limit their time outdoors.