Charleston, WV Air Quality in Spring
Across 2019–2025, Charleston's spring (March–May) air quality had a median AQI of 43 (Good) over 636 monitored days in the Charleston, WV area. 0.0% of spring days (0 of 636) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 63.1% of days. The cleanest spring on record here was 2025 (median AQI 39, 0 days above 100) and the worst was 2021 (median 47, 0 days above 100, peak AQI 84).
- Good: 76.3%
- Moderate: 23.7%
- 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 spring?
Good on a typical day: median AQI 43 across 2019–2025, with 0.0% of spring days above AQI 100. Ground-level ozone is the main driver.
- ✓76.3% of spring days were Good (AQI 0–50), 23.7% Moderate (51–100).
- ✓0 days of 636 reached AQI 101+; the spring peak was 90.
- ✓Cleanest month: May; worst month: April.
Frequently asked questions
What is the air quality like in Charleston in spring?▾
Across 2019–2025, the median daily AQI in Charleston in spring was 43 (Good). 76.3% of days were Good, 23.7% Moderate, and 0.0% reached Unhealthy for Sensitive Groups or worse, based on 636 monitored days in EPA's Air Quality System.
Is spring a good time for outdoor exercise in Charleston?▾
A typical spring day in Charleston sits in the Good range (median AQI 43), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Which pollutant causes Charleston's spring air quality problems?▾
Ground-level ozone set the daily AQI on 63.1% of spring days in Charleston. The highest spring AQI recorded in 2019–2025 was 90 (Moderate), in 2021.
Charleston spring air quality, year by year
Charleston spring air quality by year (Charleston, WV, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 92 | 46 | 0 | 84 | O3 |
| 2020 | 92 | 42 | 0 | 61 | O3 |
| 2021worst | 92 | 47 | 0 | 84 | O3 |
| 2022 | 85 | 42 | 0 | 90 | O3 |
| 2023 | 91 | 44 | 0 | 87 | O3 |
| 2024 | 92 | 40 | 0 | 64 | O3 |
| 2025cleanest | 92 | 39 | 0 | 63 | O3 |
What spring air means in Charleston
A typical spring day in Charleston sits in the Good range (median AQI 43), so running, cycling and children's outdoor play are fine for everyone on most days; fewer than 1% of spring days reached AQI 101+ in 2019–2025.
Spring's median AQI of 43 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 Spring AQI across every EPA metro area (307,196 metro-days, 2019–2025) is 43, so Charleston runs in line with the national Spring norm; 0.0% of its Spring days topped AQI 100 versus 0.8% nationally (about the same).
Within the season, May is the cleanest month (median AQI 42, 0.0% of days above 100) and April the worst (median 44, 0.0% above 100).
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 season 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.