SmogRank / Chile / Tarapacá / Alto Hospicio
Alto Hospicio, month by month
Alto Hospicio has a measured daily mean on 1,081 days since 7 May 2023. Its worst month was May 2023, at 75 US AQI (21.8 µg/m³), 96th of 1,600 cities on that month's world ranking. Its cleanest was December 2023, at 60 US AQI (14.0 µg/m³). 2025 averaged 66 US AQI (17.3 µg/m³), against 65 US AQI (16.6 µg/m³) in 2024.
Every month since 2023
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Months without a mean, and why
4 months
| Month | Why |
|---|---|
| Feb 2025 | 17 of 28 days measured; a month needs 20. The others: 11 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Alto Hospicio's worst months
| Month | US AQI | World rank |
|---|---|---|
| May 2023 | 7521.8 µg/m³ | 96thof 1,600 |
| June 2023 | 7421.2 µg/m³ | 248thof 1,603 |
| July 2023 | 7321.1 µg/m³ | 69thof 1,432 |
| August 2023 | 7019.2 µg/m³ | 137thof 1,980 |
| July 2025 | 7019.2 µg/m³ | 226thof 2,889 |
| June 2025 | 6918.6 µg/m³ | 269thof 2,508 |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Alto Hospicio's worst days
| Day | US AQI |
|---|---|
| 11 Mar 2024 | 15561.0 µg/m³ |
| 12 Mar 2024 | 12946.7 µg/m³ |
| 2 Nov 2025 | 12645.5 µg/m³ |
| 9 Mar 2024 | 11340.5 µg/m³ |
| 1 Jan 2024 | 11039.3 µg/m³ |
| 28 Feb 2024 | 10838.5 µg/m³ |
| 5 Aug 2023 | 10738.1 µg/m³ |
| 25 Sept 2023 | 10738.1 µg/m³ |
| 13 Mar 2024 | 10035.3 µg/m³ |
| 27 Feb 2024 | 9432.3 µg/m³ |
Daily means, the highest since 7 May 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Alto Hospicio, Chile, 7 May 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/alto-hospicio/history (accessed 13 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Alto Hospicio now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).