Air quality in Tocopilla, Antofagasta Region, Chile today

Mr. Duck’s Air Quality Score

Moderate air today for Tocopilla, 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 Tocopilla today is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles). Measurements show a PM2.5 reference value of 30.0 and a PM10 reference value of 64.0, based on eight 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 Tocopilla air‑quality record contains data for six monitoring sites spread across the city, amounting to twenty‑one individual rows of observations. All six common pollutants tracked by OpenAQ are represented: 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 measurements come from the PM10, PM2.5 and SO₂ series, each updated on 2026‑02‑10 at 14:00 UTC. At that time the Tres Marias site reported a PM10 concentration of 54.0 µg/m³ and a PM2.5 concentration of 30.0 µg/m³, while the Super Site logged SO₂ at 11.48 µg/m³. These three pollutants show a fairly wide spread: PM10 values range from 10.23 to 64.0 µg/m³ with a median of about 53 µg/m³; PM2.5 varies between 3.91 and 46.24 µg/m³, median roughly 27 µg/m³; SO₂ spans 0.0 to 16.11 µg/m³, median near 11.5 µg/m³.

In contrast, the CO, NO₂ and O₃ records are considerably older, last refreshed on 2021‑08‑20 at 21:00 UTC. The most recent CO reading from Super Site stands at 639.04 µg/m³, with values ranging narrowly between 614.2 and 639.04 µg/m³ (median about 627 µg/m³). NO₂ shows a low‑end of 0.9 µg/m³ up to 10.66 µg/m³ (median ≈5.8 µg/m³), while O₃ varies from 19.31 to 41.93 µg/m³ (median ≈30.6 µg/m³).

Overall, the dataset provides a recent snapshot for particulate matter and sulfur dioxide but relies on three‑year‑old entries for gases, meaning that current conditions for CO, NO₂ and O₃ may differ from what is shown. With only six stations contributing, spatial coverage is limited; variations in pollutant levels can therefore exist across different neighborhoods and times not captured by the available rows.

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 Tocopilla is based on eight valid measurements and was refreshed within three days, with the most recent update recorded at 2026‑02‑10T14:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can differ across neighborhoods and throughout the day, so values may not represent the entire city’s current environment.

OpenAQ station rows