Charleston, WV Air Quality in April
Across 2019–2025, Charleston's April air quality had a median AQI of 44 (Good) over 203 monitored days in the Charleston, WV area. 0.0% of April days (0 of 203) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 69.5% of days. The cleanest April on record here was 2022 (median AQI 39, 0 days above 100) and the worst was 2021 (median 48, 0 days above 100, peak AQI 67).
- Good: 74.9%
- Moderate: 25.1%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Extra Protection for Charleston Homes
Air quality in Charleston is moderate (AQI 55), with fine particles (PM2.5) the main concern. A True-HEPA purifier gives sensitive groups — kids, seniors and anyone with asthma or allergies — cleaner air indoors on days like today.
Recommended: Coway AP-1512HH Mighty — True HEPA + carbon · CADR ~246 CFM · rooms up to 361 sq ft
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How is the air in Charleston in April?
Good on a typical day: median AQI 44 across 2019–2025, with 0.0% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓74.9% of April days were Good (AQI 0–50), 25.1% Moderate (51–100).
- ✓0 days of 203 reached AQI 101+; the April peak was 87.
- ✓Best April: 2022; worst April: 2021.
Frequently asked questions
What is the air quality like in Charleston in April?▾
Across 2019–2025, the median daily AQI in Charleston in April was 44 (Good). 74.9% of days were Good, 25.1% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 203 monitored days in EPA's Air Quality System.
Is April a good time for outdoor exercise in Charleston?▾
A typical April day in Charleston sits in the Good range (median AQI 44), 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 Charleston's April air quality problems?▾
Ground-level ozone set the daily AQI on 69.5% of April days in Charleston. The highest April AQI recorded in 2019–2025 was 87 (Moderate), in 2021.
Charleston April air quality, year by year
Charleston April air quality by year (Charleston, WV, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 47 | 0 | 84 | O3 |
| 2020 | 30 | 46 | 0 | 61 | O3 |
| 2021worst | 30 | 48 | 0 | 67 | O3 |
| 2022cleanest | 23 | 39 | 0 | 54 | O3 |
| 2023 | 30 | 45 | 0 | 87 | O3 |
| 2024 | 30 | 43 | 0 | 56 | PM2.5 |
| 2025 | 30 | 42 | 0 | 62 | O3 |
What April air means in Charleston
A typical April day in Charleston sits in the Good range (median AQI 44), 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 44 is in line with Charleston's whole-year median of 41, so this period is neither a clean nor a dirty stretch for the area. Nationally, the median April AQI across every EPA metro area (100,677 metro-days, 2019–2025) is 44, so Charleston runs in line with the national April norm; 0.0% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Charleston's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Charleston
The latest EPA AirNow observation puts Charleston's AQI at 55 (PM2.5). The figures above are multi-year month statistics, not today's reading.
View current Charleston air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Charleston, WV), 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.