Air quality in Alsip, Illinois, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Alsip, Illinois, 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 today in Alsip, Illinois is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements recorded by OpenAQ show a PM2.5 concentration of 14.6 µg/m³.
One valid measurement was used to determine this assessment. No PM10 value is available for the current report. 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 data for Alsip includes two measured pollutants—ozone (O3) and fine particulate matter (PM2.5)—recorded from a single monitoring location. In total there are two rows of observations, one for each pollutant. The ozone reading is 0.002 ppm, reported by the ALSIP sensor with its most recent timestamp on 2025-11-04 14:00 UTC. The PM2.5 concentration is 14.6 µg/m³, also from the ALSIP sensor, and was last updated on 2026-02-10 23:00 UTC.
Because only one station contributes data, coverage across the city is limited to that specific site. The ozone values show no variation; the minimum, median, maximum and both the 10th‑percentile and 90th‑percentile are all 0.002 ppm, indicating a single static measurement rather than a range of observations. In contrast, the PM2.5 data also present a single static value—14.6 µg/m³—so there is no spread to describe either pollutant’s variability over time.
Freshness differs markedly between the two pollutants. The ozone record dates back more than a year and is flagged as “Old data,” while the PM2.5 measurement was refreshed within the past week, marked as “Updated within 7 days.” This mix of old and recent timestamps means that current conditions for ozone are not captured in real time, whereas the particulate matter reading reflects a relatively up‑to‑date snapshot.
Overall, the dataset offers only two rows from one sensor, providing limited spatial insight into Alsip’s air quality. The static nature of both measurements and the age disparity between pollutants suggest that citywide conditions can vary beyond what is shown here, especially for ozone where recent data are lacking.
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 a single valid measurement and was updated within 3 days, with the most recent reading recorded at 2026‑02‑10T23:00:00+00:00. This snapshot provides a momentary view of air quality in Alsip, Illinois; conditions can differ across neighborhoods and change rapidly throughout the day, so the displayed values may not represent current or location‑specific levels elsewhere in the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| ALSIP | o3 | 0.002 | ppm | 2025-11-04 14:00 UTC |
| ALSIP | pm25 | 14.6 | µg/m³ | 2026-02-10 23:00 UTC |