Fargo Air Quality in April
Across 2019–2025, Fargo's April air quality had a median AQI of 40 (Good) over 210 monitored days in the Fargo, ND-MN area. 0.0% of April days (0 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 77.1% of days. The cleanest April on record here was 2020 (median AQI 37, 0 days above 100) and the worst was 2023 (median 44, 0 days above 100, peak AQI 81).
- Good: 87.1%
- Moderate: 12.9%
- Unhealthy for Sensitive Groups: 0.0%
- Unhealthy or worse: 0.0%
Reducing Indoor Ozone
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, "ionizer" purifiers) and ventilating when outdoor ozone is low (early morning). A high-carbon unit also helps with the gases and VOCs that linger indoors.
Recommended: Coway AP-1512HH (HEPA + Carbon) — True HEPA + activated carbon layer · rooms up to 361 sq ft
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How is the air in Fargo in April?
Good on a typical day: median AQI 40 across 2019–2025, with 0.0% of April days above AQI 100. Ground-level ozone is the main driver.
- ✓87.1% of April days were Good (AQI 0–50), 12.9% Moderate (51–100).
- ✓0 days of 210 reached AQI 101+; the April peak was 81.
- ✓Best April: 2020; worst April: 2023.
Frequently asked questions
What is the air quality like in Fargo in April?▾
Across 2019–2025, the median daily AQI in Fargo in April was 40 (Good). 87.1% of days were Good, 12.9% Moderate, and 0.0% 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 Fargo?▾
A typical April day in Fargo sits in the Good range (median AQI 40), 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 Fargo's April air quality problems?▾
Ground-level ozone set the daily AQI on 77.1% of April days in Fargo. The highest April AQI recorded in 2019–2025 was 81 (Moderate), in 2023.
Fargo April air quality, year by year
Fargo April air quality by year (Fargo, ND-MN, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 41 | 0 | 54 | O3 |
| 2020cleanest | 30 | 37 | 0 | 63 | O3 |
| 2021 | 30 | 41 | 0 | 75 | O3 |
| 2022 | 30 | 38 | 0 | 53 | O3 |
| 2023worst | 30 | 44 | 0 | 81 | O3 |
| 2024 | 30 | 40 | 0 | 50 | O3 |
| 2025 | 30 | 42 | 0 | 63 | O3 |
What April air means in Fargo
A typical April day in Fargo sits in the Good range (median AQI 40), 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 40 is in line with Fargo's whole-year median of 38, 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 Fargo runs below the national April norm; 0.0% of its April days topped AQI 100 versus 0.7% nationally (about the same).
April is part of Fargo's spring season (March, April, May); the spring page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Fargo, ND-MN), 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.