Winchester City, Virginia Air Quality
Winchester City County, Virginia (VA)
↓ Improvingover 7 years
How Winchester City, Virginia Air Quality Compares
Winchester City, Virginia's median AQI of 6is 85% better than the national average of 41. The area rarely experiences unhealthy air quality days. The primary pollutant of concern is Coarse Particulate Matter (PM10).
10-Year AQI Trend
The solid line shows the median AQI each year. The dashed line shows the 90th percentile (worst 10% of days). This area has seen measurable air quality improvement over the decade.
Air Quality Day Breakdown
Number of days per year in each EPA AQI category. Green = Good (AQI 0-50), Yellow = Moderate (51-100), Orange = Unhealthy for Sensitive Groups (101-150), Red = Unhealthy or worse (151+).
Year-by-Year Data
| Year | Median AQI | 90th Pct | Max AQI | Good Days | Moderate | Unhealthy+ | Pollutant |
|---|---|---|---|---|---|---|---|
| 2020 | 6 | 12 | 18 | 58 | 0 | 0 | PM10 |
| 2019 | 8 | 14 | 24 | 57 | 0 | 0 | PM10 |
| 2018 | 8 | 16 | 20 | 60 | 0 | 0 | PM10 |
| 2017 | 11 | 17 | 19 | 59 | 0 | 0 | PM10 |
| 2016 | 10 | 16 | 25 | 59 | 0 | 0 | PM10 |
| 2015 | 11 | 17 | 31 | 59 | 0 | 0 | PM10 |
| 2014 | 8 | 14 | 18 | 61 | 0 | 0 | PM10 |
What This Means for Winchester City County Residents
Winchester City, Virginia has received an Air Quality Grade of A (85/100) based on a decade of monitoring data from the EPA's air quality monitoring program. The current median AQI of 6 falls in the "Good" range.
Encouragingly, air quality here has been improving, with the median AQI dropping by 2 points over the monitoring period. This trend suggests continued investment in emission controls and cleaner energy.
The primary pollutant affecting this area is Coarse Particulate Matter (PM10). Over the past 5 years, this area has averaged 0 unhealthy air quality days per year, days when sensitive groups (children, elderly, those with respiratory conditions) should limit outdoor activity. The American Lung Association's State of the Air report provides additional context on long-term health risks from air pollution exposure.
Related Cities in Virginia
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Frequently Asked Questions
Winchester City, Virginia has a current median AQI of 6, which falls in the "Good" range. The area has received an Air Quality Grade of A (85/100) based on 10 years of EPA monitoring data.
Air quality in Winchester City, Virginia is improving over the past decade. The median AQI has changed by -2 points from 2014 to 2020.
Winchester City, Virginia averages 0 unhealthy air quality days per year over the past 5 years. On these days, sensitive groups including children, the elderly, and those with respiratory conditions should limit outdoor activity.
The primary pollutant affecting Winchester City, Virginia is Coarse Particulate Matter (PM10). This is the dominant contributor to elevated AQI readings in the Winchester City County area.
Winchester City, Virginia averages 0 unhealthy air days per year. This is relatively low, making it a reasonable choice for asthma sufferers. The primary pollutant is Coarse Particulate Matter (PM10), which can affect respiratory health.
With a median AQI of 6 (Good), outdoor exercise in Winchester City, Virginia is generally safe year-round. Winchester City, Virginia averages 0 days per year when athletes should move workouts indoors.
Explore Air Quality Data
this entity is one of the data points covered by this site’s U.S. air quality and pollution monitoring dataset. The detail above comes directly from the EPA Air Quality System (AQS); the context that follows situates the headline numbers against the broader distribution across U.S. counties and states.
Every number on this page links back to the EPA Air Quality System (AQS); the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. counties and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.