Air quality in Chiguayante, Biobio Region, Chile today
Mr. Duck’s Air Quality Score
Moderate air today for Chiguayante, 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 Chiguayante today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 13.0 and a PM10 reference value of 23.0, based on three valid observations collected via OpenAQ.
These figures reflect the current monitoring results for the city. 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 data set for Chiguayante includes six monitoring rows that together report on carbon monoxide (CO), nitrogen dioxide (NO2), ozone (O3), particulate matter 10 µm or less (PM10), particulate matter 2.5 µm or less (PM2.5) and sulfur dioxide (SO₂). All values come from the single station identified as Punteras, so spatial coverage is limited to one location within the city.
Freshness varies considerably across pollutants. The most recent CO reading dates back to 2017‑06‑28 16:00 UTC, the same timestamp applies to O3, while NO2 was last updated on 2021‑08‑20 21:00 UTC. In contrast, PM10, PM2.5 and SO₂ have been refreshed very recently, with their latest measurements recorded at 2026‑02‑10 13:00 UTC, indicating that particulate and sulfur data are up‑to‑date within the last three days. Overall, three of the six rows fall into the “old” freshness bucket, meaning half of the available parameters rely on data that is several years old.
The numeric values show a very narrow range for each pollutant because only one station contributes. CO and O3 are both reported as 0.0 µg/m³, NO2 consistently measures 12.82 µg/m³, PM10 registers 23.0 µg/m³, PM2.5 is at 13.0 µg/m³ and SO₂ records 12.91 µg/m³. Since each metric has a single minimum, median and maximum value, there is no observed variability within the dataset.
Because the station count is limited to one and half of the parameters are based on old measurements, the picture presented here captures only a snapshot of air quality at Punteras and may not reflect conditions elsewhere in Chiguayante or recent changes that have occurred since the older timestamps.
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 Chiguayante includes three valid measurements and is marked as Updated within 3 days, with the latest values recorded on 2026‑02‑10 at 13:00 UTC. This snapshot reflects conditions at specific monitoring points and times; air quality can differ across neighborhoods and throughout the day, so individual experiences may vary from the reported figures.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Punteras | co | 0.0 | µg/m³ | 2017-06-28 16:00 UTC |
| Punteras | no2 | 12.82 | µg/m³ | 2021-08-20 21:00 UTC |
| Punteras | o3 | 0.0 | µg/m³ | 2017-06-28 16:00 UTC |
| Punteras | pm10 | 23.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Punteras | pm25 | 13.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Punteras | so2 | 12.91 | µg/m³ | 2026-02-10 13:00 UTC |