Air quality in Dayton, Washington, United States of America today
Mr. Duck’s Air Quality Score
Moderate air today for Dayton, Ohio, 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 Dayton, Washington is currently classified as Moderate. The primary pollutant measured today is PM2.5 (fine particles). OpenAQ data show a PM2.5 reference value of 27.0 and a PM10 reference value of 42.0 based on three valid measurements.
These values reflect the conditions recorded at the time of sampling. 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 PM2.5 measurements are available, coming from a single monitoring site identified as Dayton‑W Main. The most recent reading was recorded on 2026-02-10 23:00 UTC and the dataset indicates that this value was updated within the past seven days.
Because there is just one row of data, the reported range for PM2.5 is extremely narrow: the minimum, median, and maximum values are all 0.6 µg/m³, with both the 10th and 90th percentiles matching that same figure. This means the dataset provides a single snapshot rather than a spread of observations across different locations or times. The freshness flag shows the measurement is recent, but the overall coverage is limited to one point source, so conditions elsewhere in Dayton may differ from what this solitary reading captures.
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 dataset for Dayton, Washington includes three valid measurements and was updated within 3 days, with the latest refresh on 2026‑02‑10 at 23:00 UTC. These values reflect a brief sampling period and may not capture all variations across the city. Air quality can differ by location and time of day, so conditions you experience locally might be higher or lower than shown here.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Dayton-W Main | pm25 | 0.6 | µg/m³ | 2026-02-10 23:00 UTC |