Air quality in Plymouth, Massachusetts, United States of America today
Mr. Duck’s Air Quality Score
Good air today for Plymouth, England, United Kingdom
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Plymouth, Massachusetts is classified as Good today. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 5.0 and a PM10 reference value of 12.0 based on five valid observations collected via OpenAQ.
Overall conditions meet the criteria for a Good rating, reflecting low concentrations of the listed particulates. 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 Plymouth, Massachusetts dataset pulls in six sensor records from OpenAQ, each reporting a single set of measurements at one moment in time. All six rows are flagged as “unknown” for their timestamp, meaning the most recent update cannot be identified; consequently the data does not show when these values were recorded. Because every row is missing a fresh date‑time stamp, the dataset offers only a snapshot rather than a continuously refreshed view of air quality.
The available pollutants are PM1, PM10, PM2.5, relative humidity, temperature and UM003 (particle count). For each pollutant the six records share identical values: PM1 averages 7.29 µg/m³, PM10 13.76 µg/m³ and PM2.5 5.77 µg/m³; relative humidity is steady at 67.58 %, temperature at 24.22 °C, and UM003 records a particle concentration of 1 062 particles per cm³. Because the minimum, median and maximum are all the same for every metric, there is no observed spread in the data across the six rows.
These numbers illustrate that the current coverage is limited to a single point in time and a single location, with no temporal variation captured. While the dataset does list all six common air‑quality parameters, the lack of recent timestamps and the uniform values mean it cannot reflect how conditions change throughout the day or differ across neighborhoods in Plymouth. Users should keep in mind that actual air quality may vary widely by place and time, and this snapshot provides only a very narrow view of the city’s environment.
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 five valid measurements and is updated within 3 days, with the most recent reading recorded on 2026‑02‑10T20:00:00+00:00. This snapshot represents conditions at a specific time and location; air quality can vary across different neighborhoods and moments throughout Plymouth, Massachusetts.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Plymouth, MA, USA | pm1 | 7.288690487543742 | µg/m³ | |
| Plymouth, MA, USA | pm10 | 13.757440487543741 | µg/m³ | |
| Plymouth, MA, USA | pm25 | 5.773809472719829 | µg/m³ | |
| Plymouth, MA, USA | relativehumidity | 67.58207321166992 | % | |
| Plymouth, MA, USA | temperature | 24.223809719085693 | c | |
| Plymouth, MA, USA | um003 | 1061.9424540201824 | particles/cm³ |