Air quality in Calama, Antofagasta Region, Chile today

Mr. Duck’s Air Quality Score

Moderate air today for Calama, Antofagasta 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 in Calama today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 17.0 and a PM10 reference value of 76.0, based on eight valid observations reported through OpenAQ.

These values reflect the current conditions without implying any trend or cause. Data are presented solely for informational purposes. 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 dataset for Calama contains measurements of six common air‑quality pollutants – carbon monoxide (CO), nitrogen dioxide (NO₂), ozone (O₃), particulate matter ≤ 10 µm (PM10), particulate matter ≤ 2.5 µm (PM2.5) and sulphur dioxide (SO₂). In total 18 rows of observations are recorded across seven monitoring stations, but the coverage is uneven: recent data (updated within the last three days) exist for SO₂, PM10 and PM2.5, while CO, NO₂ and O₃ are only represented by a single historic entry from August 2021.

For the freshest pollutants the latest values were logged on 2026‑02‑10 at 14:00 UTC (SO₂, PM10) and 13:00 UTC (PM2.5). SO₂ shows a median of 12.64 µg/m³ with individual readings ranging from 0 to 25.62 µg/m³; the example value is 13.32 µg/m³ at the Oasis site. PM10 values sit between 44 and 76 µg/m³, median 56 µg/m³, with a peak of 76 µg/m³ recorded at Nueva ChiuChiu. PM2.5 measurements are tighter, from 16 to 21 µg/m³, median 17.5 µg/m³, and the lowest observed value (16 µg/m³) comes from Colegio Pedro Vergara Keller.

The older pollutants each have a single entry: CO is reported at 517.93 µg/m³, NO₂ at 14.55 µg/m³ and O₃ at 32.47 µg/m³, all from the Estación Centro site on 2021‑08‑20 at 21:00 UTC. Because these three gases lack recent observations, their current levels in Calama cannot be inferred from this dataset. Overall, while particulate matter and sulphur dioxide are monitored with relatively fresh and multiple readings, the gas‑phase pollutants rely on outdated data, highlighting gaps in temporal coverage that may affect how fully city‑wide conditions are captured at any given moment.

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 Calama are based on eight valid measurements and were updated within 3 days, with the latest record logged at 2026‑02‑10 14:00 UTC. This snapshot reflects conditions measured at specific monitoring sites and times; air quality can differ across neighborhoods and throughout the day, so values may not represent every location or moment in the city.

OpenAQ station rows