Ozone in Winston-Salem, NC
Real-time Ground-level Ozone monitoring and health recommendations
Current Ozone Levels
Overall AQI
About Ground-level Ozone
A harmful gas created by chemical reactions between pollutants in sunlight.
Measured in ppb
Health Impact
Air quality is considered satisfactory, and air pollution poses little or no risk.
What Is a Safe Level of Ozone?
By the EPA Air Quality Index, ground-level ozone is Good — safe for everyone up to 54 ppb (AQI 0–50). From 54 to 70 ppb is Moderate (AQI 51–100): acceptable for most people, though unusually sensitive individuals may notice symptoms. Above 70 ppb the air turns Unhealthy for Sensitive Groups and EPA health guidance applies.
Winston-Salem is currently at AQI 21 (≈23 ppb, estimated) for Ozone — within the Good range, so Ozone levels are safe for everyone right now.
Thresholds are the official EPA AQI category breakpoints for ground-level ozone (8-hour standard). The current concentration is estimated from the measured AQI sub-index; the exact value within a band is not recoverable from the index alone.
Sources of Ozone
• Chemical reactions between NOx and VOCs in sunlight
• Vehicle emissions
• Industrial facilities
• Gasoline vapors and solvents
Other Pollutants
Full Air Quality Report
View all pollutants and comprehensive air quality data for Winston-Salem.
View Full ReportReduce Indoor Ozone in Winston-Salem
Today's main pollutant in Winston-Salem is ground-level ozone (AQI 21). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
As an Amazon Associate, we earn from qualifying purchases.
Reduce Indoor Ozone in Winston-Salem
Today's main pollutant in Winston-Salem is ground-level ozone (AQI 21). Important: standard HEPA filters do NOT remove ozone — only a purifier with a substantial activated-carbon bed adsorbs it. The biggest wins are cutting indoor sources (gas appliances, certain "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit helps with the gases and VOCs that linger indoors.
Compare activated-carbon purifiers (for gases & ozone):
Prices are approximate and subject to change. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
Air Purifier & Monitor Buying Guides
Not sure which device fits your needs? Our hands-on guides break down the best picks by use case.