Norris, South Carolina Air Quality
Norris has a median AQI of 44, earning an air quality grade of A- — excellent air quality that ranks better than 34% of US cities. Air quality has remained relatively stable over the past decade. Ground-level ozone is the primary concern, typically peaking on warm sunny days due to vehicle and industrial emissions. In 2019, Norris recorded 77 good air quality days (78% of monitored days).
Population: 784 • County: Pickens
Current AQI
Quick Facts
| Current AQI | 28 — Good |
| Air Quality Grade | A- |
| Median AQI (2019) | 44 |
| vs. U.S. Cities | Better than 34% |
| Primary Pollutant | Ozone |
| Unhealthy Days/Year | 0 |
| 10-Year Trend | → Stable |
| Data Source | EPA AQS (historical) · AirNow (live) |
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 90 Days
Current Pollutant Levels
Real-time data from EPA AirNow
Local Air Quality Context
Air quality data for Norris is sourced from the Greenville-ESC monitoring area, located approximately 20 miles from city center. This EPA-certified station continuously tracks ground-level ozone, the primary driver of air quality alerts in this area.
Norris has relatively consistent air quality throughout the year without a strong seasonal peak. Air quality is primarily influenced by local traffic, industrial activity, and regional weather patterns rather than a single seasonal driver.
AQI Trend (10 Years)
Air Quality Days by Year
Norris Median AQI by Year
Annual EPA air quality data for Norris — median AQI, day-category breakdown, and primary pollutant per year.
| Year | Median AQI | Good Days | Unhealthy Days | Max AQI | Primary Pollutant |
|---|---|---|---|---|---|
| 2019 | 44 | 77 | — | 84 | Ozone |
| 2018 | 40 | 132 | — | 84 | Ozone |
| 2017 | 41 | 265 | — | 84 | Ozone |
| 2016 | 44 | 213 | 1 | 108 | Ozone |
Source: EPA Air Quality System (AQS) annual summaries. "Unhealthy Days" includes Unhealthy for Sensitive Groups, Unhealthy, Very Unhealthy, and Hazardous categories.
2019 Air Quality Summary
Primary Pollutant Days (2019)
Days when each pollutant was the primary driver of AQI. Learn about pollutants →
Frequently Asked Questions About Norris Air Quality
What is the air quality in Norris today?
The current AQI in Norris is 28, rated "Good". Air quality is good — outdoor activity is safe for everyone today. Air quality is satisfactory, and air pollution poses little or no risk.
Is air quality in Norris getting better or worse?
Air quality in Norris has been stable. The median AQI has remained stable at around 44 over the past decade.
What is the most common air pollutant in Norris?
Ozone is the primary air pollutant in Norris, responsible for 99 days (100% of monitored days) in 2019. Ground-level ozone forms when sunlight reacts with emissions from vehicles and industry, typically peaking on hot summer afternoons.
How many unhealthy air days does Norris have per year?
In 2019, Norris recorded 78% good air quality days (77 days) out of 99 monitored days. There were 0 Unhealthy for Sensitive Groups days and 0 Unhealthy days (AQI above 100). The highest single-day AQI recorded was 84.
What air quality grade does Norris receive?
Norris receives an air quality grade of A-, placing it better than 34% of US cities. This is based on a median AQI of 44 in 2019, with 77 good air quality days. The EPA monitors air quality in this area continuously using certified monitoring stations.
Air Quality Grade
Better than 34% of US cities
Nearby Cities
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National Rankings
See how Norris compares to every other US city by air quality.
Best Air Quality Cities →All city rankingsRecommended Air Purifiers for Norris
Ozone is Norris's primary pollutant. Standard HEPA filters don't capture ozone molecules — you need activated carbon or PECO technology to chemically break them down. We highlight those units here.
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