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June 21, 2017 – The Northern Sierra Air Quality Management District and the Nevada County Public Health Department are issuing a joint Air Quality Health Advisory to notify the public of expected poor air quality today through Sunday, June 25 due to conditions favoring ozone formation.
With high temperatures, sun, poor dispersion and a southwest afternoon airflow, ozone in western Nevada County is likely to reach the “Unhealthy for Sensitive Groups” range, and may occasionally reach the “Unhealthy” range from now through the weekend. Concentrations are likely to be highest in the late afternoon and night, and then fall into the Moderate range in the morning.
Exposure to elevated ozone concentrations can result in eye and throat irritation, headaches, nausea, shortness of breath, congestion, coughing, impaired lung function and chest pain. People most likely to feel health effects from ozone are the elderly, children, individuals with asthma or other cardiovascular conditions, pregnant women and anyone who is exercising or working hard outdoors.
The following actions are recommended:
• Limit outdoor exercise to the morning hours and minimize outdoor activity in the afternoon and evening;
• Stay indoors with doors and windows closed as much as possible, and run the air conditioner on the “recirculate” setting if that is an option;
• People with asthma should follow their asthma management plan;
• Contact your doctor if you have symptoms of cough, shortness of breath, chest pain or severe fatigue.