Air quality in Hamilton, Montana, United States of America today
Mr. Duck’s Air Quality Score
Unhealthy for sensitive groups for Hamilton, Ontario, Canada
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Hamilton, Montana is classified as USG today. The primary pollutant identified is PM2.5 (fine particles). Measurements from 30 valid observations show a PM2.5 concentration of 42.25 µg/m³.
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
The current station data listed for this city is focused on particulate matter (PM). Only one monitoring row is available, and it reports PM2.5 concentrations measured in Hamilton at 6.4 µg/m³. The single observation was recorded on 2026-01-24 14:00 UTC, making the timestamp relatively recent compared with typical reporting cycles.
Because the dataset contains just a single entry, there is no range of values to compare; the minimum, median, and maximum all equal 6.4 µg/m³, and the 10th and 90th percentiles are identical as well. This uniformity reflects the limited coverage rather than any underlying variability in air quality. With only one station reporting PM2.5, the city’s overall picture is sparse, so conditions may differ across neighborhoods or change over time without being captured here. Users should keep in mind that additional monitoring locations could provide a more complete view of Hamilton’s particulate matter levels.
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 Hamilton, Montana reflects 30 valid measurements and is Updated within 30 days, with the most recent reading recorded on 2026‑02‑10 at 22:00 UTC. This snapshot provides a concise 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 |
|---|---|---|---|---|
| Hamilton | pm25 | 6.4 | µg/m³ | 2026-01-24 14:00 UTC |