Air quality in Cecil County, Maryland, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Cecil County, Maryland, 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 Cecil County, Maryland is rated as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 concentration of 15.0 µg/m³ based on two valid observations recorded by OpenAQ.
These values reflect the current assessment for the area. 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 air‑quality dataset for Cecil County, Maryland currently contains measurements for two key pollutants: ozone (O3) and fine particulate matter (PM2.5). Both pollutants are represented by a single monitoring location – the Fair Hill station – so there is one row of data for each pollutant, giving a total of two recent observations.
The most up‑to‑date O3 reading was recorded on 2026-02-09 18:00 UTC and shows a concentration of 0.027 ppm. The PM2.5 value comes from the later timestamp of 2026-02-10 23:00 UTC, reporting 15.0 µg/m³. Because both timestamps fall within the last seven days, the dataset is considered fresh for each pollutant.
All three statistical summaries – minimum, median and maximum – are identical for each contaminant (O3: 0.027 ppm; PM2.5: 15.0 µg/m³), indicating that only a single measurement is available rather than a range of values over time. Consequently, the typical or central tendency cannot be distinguished from variability; the data set does not capture fluctuations that might occur throughout the day or across different locations in the county.
With just one monitoring site contributing to both pollutant streams, spatial coverage is limited to the Fair Hill area. While the timestamps are recent, the lack of multiple stations means the dataset may not reflect conditions elsewhere in Cecil County. Users should keep in mind that air‑quality can differ by neighborhood and time, and the current data provides only a snapshot from this single location.
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 for Cecil County reflects two valid measurements and was refreshed recently, with the latest update recorded on 2026‑02‑10 at 23:00 UTC; it is considered “Updated within 3 days.” This snapshot provides a brief view of current conditions, but air quality can vary by location and time within the city, so values may differ across neighborhoods or later in the day.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Fair Hill | o3 | 0.027 | ppm | 2026-02-09 18:00 UTC |
| Fair Hill | pm25 | 15.0 | µg/m³ | 2026-02-10 23:00 UTC |