Air quality in Caroline County, Maryland, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Caroline 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 in Caroline County, Maryland is currently classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 15.0 and a PM10 reference value of 18.0 based on two valid observations.
Data are shown via OpenAQ. 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 current station data listed for this city is focused on particulate matter (PM). Only two pollutant measurements are available: PM10 and PM2.5, each reported from a single monitoring location named Harmony. Both values were last updated on 2026-02-11 at 00:00 UTC, which places them within the most recent seven‑day window, indicating that the freshest data for Caroline County comes from this one site.
For PM10, the recorded concentration is consistently 18.0 µg/m³ across all reported statistics – minimum, median and maximum are identical, showing no observed variation in the limited sample. PM2.5 shows a similar pattern with a steady value of 15.0 µg/m³. Because only one row per pollutant exists, there is no spatial spread or temporal range to assess within the county; conditions elsewhere may differ from those captured at Harmony. The dataset therefore offers a very narrow snapshot rather than a comprehensive view of air quality across Caroline County.
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 Caroline County, Maryland reflects two valid measurements and was updated today (2026‑02‑11T00:00:00+00:00). This snapshot represents the most recent readings available from our monitoring network, but air quality can vary by location and time within the city, so conditions at any specific spot may differ from what is displayed here.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Harmony | pm10 | 18.0 | µg/m³ | 2026-02-11 00:00 UTC |
| Harmony | pm25 | 15.0 | µg/m³ | 2026-02-11 00:00 UTC |