Air quality in Appleton, Wisconsin, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Appleton, Wisconsin, 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 Appleton, Wisconsin is classified as Good today. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 3.7 µg/m³. This assessment is based on a single valid measurement reported through OpenAQ.
Overall conditions meet the criteria for a Good rating according to the provided data. 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 Appleton air‑quality record contains data for two pollutants – ozone (O₃) and fine particulate matter (PM₂.5). Both measurements come from a single monitoring site, Appleton AAL, so the dataset represents just one location within the city. For ozone the only reported value is 0.013 ppm; the minimum, median and maximum are all identical, indicating no observed variation in the available record. The most recent ozone reading was logged on 2025‑10‑16 12:00 UTC, which falls outside a one‑week freshness window and is therefore considered older data.
Fine particles show a similar pattern of uniformity. PM₂.5 is reported at 3.7 µg/m³ with the same figure appearing as the minimum, median and maximum. This measurement was last updated on 2026‑02‑10 23:00 UTC, placing it within the past seven days and making it the freshest data point in the set. Because each pollutant is represented by a single row, there is no spread or range to describe beyond these exact values.
Overall, the dataset offers very limited spatial coverage – only one monitoring station contributes both ozone and PM₂.5 observations – and the temporal depth is uneven. The ozone record is dated more than a year ago, while the particulate matter reading is recent. Consequently, the available numbers give a snapshot rather than a comprehensive picture of air quality across Appleton; conditions can differ by neighborhood and time of day, and additional monitoring would be needed for a fuller assessment.
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 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, but air quality can differ across neighborhoods and change throughout the day, so values may not represent every location or moment in Appleton, Wisconsin.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Appleton AAL | o3 | 0.013 | ppm | 2025-10-16 12:00 UTC |
| Appleton AAL | pm25 | 3.7 | µg/m³ | 2026-02-10 23:00 UTC |