Air quality in Puente Alto, Santiago Metropolitan Region, Chile today
Mr. Duck’s Air Quality Score
Moderate air today for Puente Alto, Santiago Metropolitan 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 today in Puente Alto is classified as Moderate. The primary pollutant identified is PM2.5 (fine particles).
Measurements show a PM2.5 reference value of 20.0 µg/m³ and a PM10 reference value of 62.0 µg/m³, based on two valid observations reported through OpenAQ. 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 Puente Alto includes six measured 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). All values come from a single monitoring station, so the row count is one for each pollutant.
Freshness varies across the series. The most recent CO, NO₂ and O₃ readings are dated 2021‑08‑20 21:00 UTC, while SO₂ was last recorded on 2022‑04‑21 18:00 UTC. In contrast, PM10 and PM2.5 have updates from just a few days ago, 2026‑02‑10 13:00 UTC, indicating that the particulate measurements are currently the most up‑to‑date in the set.
The numeric values show little spread because each pollutant has only one reported figure. CO is recorded at 709.78 µg/m³, NO₂ at 79.34 µg/m³ and O₃ at 2.7 µg/m³, all identical to their minimum, median and maximum. Particulate matter levels are 62.0 µg/m³ for PM10 and 20.0 µg/m³ for PM2.5, again with no variation. SO₂ is listed as 6.9 µg/m³.
Because the data come from a single location and many of the timestamps are several years old, they represent only a snapshot rather than continuous coverage across Puente Alto. Conditions can differ in other neighborhoods or at different times, so the available figures give a limited view of the city’s overall air quality.
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 Puente Alto is based on two valid measurements and was updated within 3 days, with the latest reading recorded at 2026‑02‑10T13:00:00+00:00. This snapshot reflects conditions at a specific time and place; air quality can vary across different neighborhoods and moments throughout the city.
OpenAQ station rows
| Station | Parameter | Value | Unit | Last updated |
|---|---|---|---|---|
| Puente Alto | no2 | 79.34 | µg/m³ | 2021-08-20 21:00 UTC |
| Puente Alto | o3 | 2.7 | µg/m³ | 2021-08-20 21:00 UTC |
| Puente Alto | pm10 | 62.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Puente Alto | pm25 | 20.0 | µg/m³ | 2026-02-10 13:00 UTC |
| Puente Alto | so2 | 6.9 | µg/m³ | 2022-04-21 18:00 UTC |