Allentown Air Quality in June
Across 2019–2025, Allentown's June air quality had a median AQI of 50 (Good) over 210 monitored days in the Allentown-Bethlehem-Easton, PA-NJ area. 5.3% of June days (11 of 210) reached Unhealthy for Sensitive Groups or worse, and ground-level ozone set the daily AQI on 54.8% of days. The cleanest June on record here was 2020 (median AQI 44, 0 days above 100) and the worst was 2023 (median 62, 6 days above 100, peak AQI 368).
- Good: 51.0%
- Moderate: 43.8%
- Unhealthy for Sensitive Groups: 2.9%
- Unhealthy or worse: 2.4%
Reduce Indoor Ozone in Allentown
Today's main pollutant in Allentown is ground-level ozone (AQI 44). 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 Allentown in June?
Good on a typical day: median AQI 50 across 2019–2025, with 5.3% of June days above AQI 100. Ground-level ozone is the main driver.
- ✓51.0% of June days were Good (AQI 0–50), 43.8% Moderate (51–100).
- ✓11 days of 210 reached AQI 101+; the June peak was 368.
- ✓Best June: 2020; worst June: 2023.
Frequently asked questions
What is the air quality like in Allentown in June?▾
Across 2019–2025, the median daily AQI in Allentown in June was 50 (Good). 51.0% of days were Good, 43.8% Moderate, and 5.3% reached Unhealthy for Sensitive Groups or worse, based on 210 monitored days in EPA's Air Quality System.
Is June a good time for outdoor exercise in Allentown?▾
A typical June day in Allentown sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 19 of June days (5.3%) reached AQI 101+ in 2019–2025.
Which pollutant causes Allentown's June air quality problems?▾
Ground-level ozone set the daily AQI on 54.8% of June days in Allentown. The highest June AQI recorded in 2019–2025 was 368 (Hazardous), in 2023.
Allentown June air quality, year by year
Allentown June air quality by year (Allentown-Bethlehem-Easton, PA-NJ, EPA AQS daily AQI)
| Year | Days monitored | Median AQI | Days above 100 | Peak AQI | Main pollutant |
|---|---|---|---|---|---|
| 2019 | 30 | 47 | 0 | 87 | PM2.5 |
| 2020cleanest | 30 | 44 | 0 | 93 | O3 |
| 2021 | 30 | 53 | 1 | 108 | PM2.5 |
| 2022 | 30 | 50 | 0 | 93 | O3 |
| 2023worst | 30 | 62 | 6 | 368 | PM2.5 |
| 2024 | 30 | 51 | 2 | 108 | O3 |
| 2025 | 30 | 52 | 2 | 122 | O3 |
What June air means in Allentown
A typical June day in Allentown sits in the Good range (median AQI 50), so running, cycling and children's outdoor play are fine for everyone on most days; about 1 day in 19 of June days (5.3%) reached AQI 101+ in 2019–2025.
June's median AQI of 50 is above Allentown's whole-year median of 46, making it one of the area's dirtier periods. Nationally, the median June AQI across every EPA metro area (100,635 metro-days, 2019–2025) is 46, so Allentown runs above the national June norm; 5.3% of its June days topped AQI 100 versus 3.7% nationally (above average).
June is part of Allentown's summer season (June, July, August); the summer page pools all three months.
Activity-specific thresholds: running, cycling, kids' sports.
Right now in Allentown
The latest EPA AirNow observation puts Allentown's AQI at 44 (O3). The figures above are multi-year month statistics, not today's reading.
View current Allentown air quality →Source: EPA Air Quality System (AQS) pre-generated Daily AQI by CBSA files — daily AQI by CBSA (Allentown-Bethlehem-Easton, PA-NJ), 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.