Daily Life Spare the Air Alert in Effect Today September 11, 2014 7:30 am Spare the Air alert in effect today, September 11th: During the summer months when ground-level ozone, or “smog,” becomes a pollution problem, the Air District issues Spare the Air Alerts for days on which air quality is forecast to be unhealthy. Previous Post Lafayette Juniors 21st Annual Rummage Sale on Oct. 4th in Lafayette Next Post Lemonade Boutique Closes in Walnut Creek