Air quality in Talcahuano, Biobio Region, Chile today

Mr. Duck’s Air Quality Score

Unhealthy for sensitive groups for Talcahuano, Biobio Region, Chile

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality today in Talcahuano is classified as USG. The primary pollutant identified is PM10, with measured concentrations indicating a reference value of 231.0 for this coarse particle fraction. Data from twelve valid measurements also show a PM2.5 reference value of 17.0.

These figures are presented through OpenAQ and reflect the current monitoring snapshot 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 Talcahuano air‑quality record draws on four monitoring stations that together report six key pollutants: carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤10 µm (PM10), particulate matter ≤2.5 µm (PM2.5) and sulfur dioxide (SO₂). The most recent data were uploaded on 2026‑02‑10 at 13:00 UTC for PM10, PM2.5 and SO₂, giving those three pollutants a freshness of less than three days. By contrast, the latest CO, NO₂ and O₃ values date back to 2021‑08‑20 at 21:00 UTC, so information on these gases is considerably older.

Across the four stations, PM10 shows a wide spread, ranging from a low of 22 µg/m³ up to a high of 231 µg/m³, with a median near 40.5 µg/m³ and the 90th percentile at about 178 µg/m³. PM2.5 is far less variable, staying between 14 and 17 µg/m³, median 15 µg/m³ and 90th percentile 16.4 µg/m³. SO₂ values also vary, from 12.9 to 21.31 µg/m³, median 14.09 µg/m³, with the upper decile around 19.3 µg/m³. The older gas measurements show broader ranges: CO spans 364 to 1 793 µg/m³ (median 1 079 µg/m³), NO₂ runs from 4.7 to 32.9 µg/m³ (median 19.0 µg/m³) and O₃ is recorded at a single value of 24.45 µg/m³.

Because only half of the pollutants have been updated within the last few days, the current picture of Talcahuano’s air quality is uneven; recent particulate data are available while gas‑phase information relies on older readings. The four stations provide modest spatial coverage, but the disparity in update frequency means that conditions can differ across the city and over time, especially for CO, NO₂ and O₃ where the latest observations are more than two years old.

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 Talcahuano includes twelve valid measurements and is marked as Updated within 3 days, with the latest values recorded on 2026‑02‑10 at 13:00 UTC. These figures represent a snapshot of conditions across the city; air quality can differ by specific location and time of day, so individual experiences may vary from the reported averages.

OpenAQ station rows