Air quality in Hualqui, Biobio Region, Chile today
Mr. Duck’s Air Quality Score
Moderate air today for Hualqui, Biobio Region, Chile
This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.
Air quality today
The air quality in Hualqui today falls into the Moderate category according to OpenAQ data. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 13.0 µg/m³ and a PM10 reference value of 24.0 µg/m³, based on three valid observations.
These values reflect the current assessment without implying any trend or cause. 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 Hualqui air‑quality dataset contains five measured pollutants – nitrogen dioxide (NO2), ozone (O3), particulate matter 10 µm or less (PM10), fine particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO2). All of these values come from a single monitoring location, giving a total of five data rows for the city.
The most recent observations are from early February 2026: PM10 and PM2.5 were recorded at 24.0 µg/m³ and 13.0 µg/m³ respectively on 2026‑02‑10 at 13:00 UTC, while SO2 was logged at 12.62 µg/m³ on the same day at 11:00 UTC. In contrast, the NO2 and O3 measurements are older, both dated 2021‑08‑20 at 21:00 UTC, with values of 9.57 µg/m³ for NO2 and 16.25 µg/m³ for O3. This mix of timestamps shows that while some pollutants have been updated within the last three days, others have not been refreshed for more than two years.
Each pollutant currently has a single recorded value, so the minimum, median and maximum are identical – there is no observed spread in the data. Because only one station contributes to all five rows, the dataset does not capture spatial variation across Hualqui; conditions can differ in other neighborhoods or at different times of day. The overall picture is therefore limited: recent readings exist for the particulate matter and sulfur dioxide, but nitrogen dioxide and ozone rely on outdated information, highlighting an uneven temporal coverage across the pollutant set.
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 Hualqui reflects three valid measurements and is updated within 3 days, with the latest values recorded at 2026‑02‑10T13:00:00+00:00. This snapshot provides a current view of ambient conditions but air quality can differ across neighborhoods and change throughout the day, so individual experiences may vary from the reported figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Hualqui | no2 | 9.57 | µg/m³ | 2021-08-20 21:00 UTC |
| Hualqui | o3 | 16.25 | µg/m³ | 2021-08-20 21:00 UTC |
| Hualqui | pm10 | 24.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Hualqui | pm25 | 13.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Hualqui | so2 | 12.62 | µg/m³ | 2026-02-10 11:00 UTC |