Greensboro Air Quality in April
Across 2019–2025, Greensboro's April air quality had a median AQI of 48 (Good) over 210 monitored days in the Greensboro-High Point, NC area. 0.5% of April days (1 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 77.6% of days. The cleanest April on record here was 2020 (median AQI 44, 0 days above 100) and the worst was 2023 (median 50, 1 day above 100, peak AQI 122).
- Good: 60.0%
- Moderate: 39.5%
- Unhealthy for Sensitive Groups: 0.5%
- Unhealthy or worse: 0.0%
Reduce Indoor Ozone in Greensboro
Today's main pollutant in Greensboro 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.
Recommended: Levoit Core 300 — True HEPA + activated carbon · CADR ~141 CFM · rooms up to 219 sq ft
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How is the air in Greensboro in April?
Good on a typical day: median AQI 48 across 2019–2025, with 0.5% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓60.0% of April days were Good (AQI 0–50), 39.5% Moderate (51–100).
- ✓1 day of 210 reached AQI 101+; the April peak was 122.
- ✓Best April: 2020; worst April: 2023.
Frequently asked questions
What is the air quality like in Greensboro in April?▾
Across 2019–2025, the median daily AQI in Greensboro in April was 48 (Good). 60.0% of days were Good, 39.5% Moderate, and 0.5% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Greensboro?▾
A typical April day in Greensboro sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
Which pollutant causes Greensboro's April air quality problems?▾
Ground-level ozone set the daily AQI on 77.6% of April days in Greensboro. The highest April AQI recorded in 2019–2025 was 122 (Unhealthy for Sensitive Groups), in 2023.
Greensboro April air quality, year by year
Greensboro April air quality by year (Greensboro-High Point, NC, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 46 | 0 | 80 | O3 |
| 2020cleanest | 30 | 44 | 0 | 51 | O3 |
| 2021 | 30 | 51 | 0 | 90 | O3 |
| 2022 | 30 | 50 | 0 | 64 | O3 |
| 2023worst | 30 | 50 | 1 | 122 | O3 |
| 2024 | 30 | 51 | 0 | 87 | O3 |
| 2025 | 30 | 48 | 0 | 71 | O3 |
What April air means in Greensboro
A typical April day in Greensboro sits in the Good range (median AQI 48), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of April days reached AQI 101+ in 2019–2025.
April's median AQI of 48 is above Greensboro's whole-year median of 44, making it one of the area's dirtier periods. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Greensboro runs above the national April norm; 0.5% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Greensboro's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Greensboro
The latest EPA AirNow observation puts Greensboro's AQI at 21 (O3). The figures above are multi-year month statistics, not today's reading.
View current Greensboro air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Greensboro-High Point, NC), 2019–2025. Daily AQI per CBSA is the highest AQI reported by any monitor in the area that day; the defining parameter is the pollutant that set it. Month and season statistics pool every such day in the period across all years listed. Retrieved 2026-09-09.