Simpsonville, South Carolina Air Quality
Simpsonville has a median AQI of 48, earning an air quality grade of B+ — good air quality that ranks better than 17% of US cities. Air quality has remained relatively stable over the past decade. Particulate matter (PM2.5) is the primary concern, often linked to vehicle traffic, industrial activity, and wildfire smoke. In 2025, Simpsonville recorded 147 good air quality days (54% of monitored days).
Population: 26,144 • County: Greenville
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Quick Facts
| Current AQI | 17 — Good |
| Air Quality Grade | B+ |
| Median AQI (2025) | 48 |
| vs. U.S. Cities | Better than 17% |
| Primary Pollutant | PM2.5 |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | → Stable |
| Data Source | EPA AirNow |
Health Recommendation
Air quality is satisfactory, and air pollution poses little or no risk.
It's a great day to be active outside!
5-Day AQI Forecast
Last 30 Days
Current Pollutant Levels
Real-time data from EPA AirNow
AQI Trend (10 Years)
Air Quality Days by Year
2025 Air Quality Summary
Primary Pollutant Days (2025)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Simpsonville Air Quality
What is the air quality in Simpsonville today?
The current AQI in Simpsonville is 17, which is rated "Good". Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Simpsonville getting better or worse?
Air quality in Simpsonville has remained relatively stable over the past decade, with a median AQI of around 48.
What is the most common air pollutant in Simpsonville?
PM2.5 is the primary air pollutant in Simpsonville, responsible for the most air quality-impacted days in 2025. Particulate matter can originate from vehicle exhaust, wildfires, and industrial emissions.
How many unhealthy air days does Simpsonville have per year?
In 2025, Simpsonville had 0 days when air quality was unhealthy or unhealthy for sensitive groups (AQI above 100). There were 147 good days and 126 moderate days out of 273 days monitored.
What air quality grade does Simpsonville receive?
Simpsonville receives an air quality grade of B+, placing it better than 17% of US cities. This grade is based on a median AQI of 48 for 2025, derived from EPA monitoring data.
Air Quality Grade
Better than 17% of US cities
Nearby Cities
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National Rankings
See how Simpsonville compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Simpsonville
Based on your area's air quality (median AQI: 48), we recommend these air purifiers to help protect your health indoors.
RabbitAir MinusA2
Stylish wall-mountable design with customizable artwork panels.
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Other Great Options
Molekule Air Pro
Commercial-grade with patented PECO technology for destroying pollutants.
Blueair Blue Pure 211+
High performance for large rooms with simple operation.
Dyson Pure Cool TP04
Premium all-in-one air purifier and fan with advanced features.
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Read our complete buying guide →