Air quality in Allentown, Pennsylvania, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Allentown, Pennsylvania, United States of America
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Allentown, Pennsylvania is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 18.1 µg/m³ based on two valid observations reported through OpenAQ.
No additional pollutants are highlighted for today’s assessment. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.
Latest sensor values
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
What the data includes
The dataset for Allentown currently contains two rows of sensor readings, one for ozone (O3) and one for fine particulate matter (PM2.5). Both measurements come from a single monitoring location in the city, so coverage is limited to that spot rather than a network of stations. The most recent data timestamp for each pollutant is 2026‑02‑10 23:00 UTC, which falls within the “updated within 7 days” freshness category, indicating that the values are relatively current.
For ozone, the sensor reports a constant concentration of 0.02 ppm across the available record; the minimum, median and maximum are all identical at 0.02 ppm, and the 10th‑percentile and 90th‑percentile values match as well. This uniformity reflects that only one measurement exists rather than a range of observations over time or space. The PM2.5 reading shows a similar pattern, with a single reported value of 18.1 µg/m³; again the minimum, median, maximum and percentile figures are all 18.1 µg/m³.
Because each pollutant is represented by just one row, there is no spread or variability to describe beyond the single point values. The dataset does not include any older or unknown‑age entries, so while the timestamps are fresh, the limited number of observations means that conditions elsewhere in Allentown or at different times may differ from what these two numbers convey. Users should keep in mind that this snapshot reflects a very narrow slice of the city’s air quality landscape.
Learn more about sources and filtering: About the data.
Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)
Latest sensor values (bars)
PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).
Data notes
The data shown reflects two valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10 at 23:00 UTC. This snapshot provides a brief view of current conditions; however, air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in Allentown.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Allentown | o3 | 0.02 | ppm | 2026-02-10 23:00 UTC |
| Allentown | pm25 | 18.1 | µg/m³ | 2026-02-10 23:00 UTC |