Air quality in Cass County, Missouri, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Cass County, Missouri, 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 Cass County, Missouri is classified as Good today. The primary pollutant identified is PM2.5 (fine particles), with a measured concentration of 1.5 µg/m³ based on one valid observation.
Data are shown via OpenAQ and reflect the current monitoring results for this location. 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
Cass County’s OpenAQ feed currently includes data for two pollutants: ozone (O₃) and fine particulate matter (PM₂.5). The dataset is built from four measurement rows collected at two monitoring stations, giving a modest spatial snapshot of air quality across the county.
The most recent ozone reading was recorded on 2025-11-04 15:00 UTC, with values ranging from a low of 0.031 ppm to a high of 0.038 ppm and a median of 0.0345 ppm. The ten‑percentile sits at 0.0317 ppm while the ninety‑percentile is 0.0373 ppm, indicating that most ozone observations cluster within a narrow band around the median. In contrast, the latest PM₂.5 data are newer, captured on 2026-02-11 00:00 UTC. These measurements span from 1.5 µg/m³ up to 9.9 µg/m³, with a median of 5.7 µg/m³; the distribution is broader, as shown by a ten‑percentile of 2.34 µg/m³ and a ninety‑percentile of 9.06 µg/m³.
Overall, the freshness of the data varies between pollutants: ozone values are over six months old, while PM₂.5 readings are current within the past week. The limited number of stations means that conditions can differ across Cass County, especially in areas not directly covered by these two sites. Users should keep in mind that the dataset reflects a small sample size and that air quality may change throughout the day and between locations not represented here.
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 current air‑quality data for Cass County, Missouri reflects a single valid measurement and was Updated today (2026‑02‑11T00:00:00+00:00). This snapshot represents conditions at the time of collection; actual pollutant levels can differ across neighborhoods and change throughout the day. Use this information as a general reference rather than a precise, location‑specific forecast.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| RG_SOUTH | o3 | 0.038 | ppm | 2016-11-01 18:00 UTC |
| RG_SOUTH | pm25 | 9.9 | µg/m³ | 2016-11-07 18:00 UTC |
| RG_South | o3 | 0.031 | ppm | 2025-11-04 15:00 UTC |
| RG_South | pm25 | 1.5 | µg/m³ | 2026-02-11 00:00 UTC |