SmogRank / Chile / Valparaiso / Concón
Concón, month by month
Concón has a measured daily mean on 1,256 days since 1 January 2023. Its worst month was June 2025, at 102 US AQI (36.0 µg/m³), 93rd of 2,508 cities on that month's world ranking. Its cleanest was November 2023, at 68 US AQI (18.0 µg/m³). 2025 averaged 83 US AQI (26.1 µg/m³), against 74 US AQI (21.6 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
2 months
| Month | Why |
|---|---|
| Mar 2023 | 11 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive. |
| Feb 2023 | 3 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Concón's worst months
| Month | US AQI | World rank |
|---|---|---|
| June 2025 | 10236.0 µg/m³ | 93rdof 2,508 |
| July 2025 | 9532.5 µg/m³ | 76thof 2,889 |
| May 2026 | 9532.5 µg/m³ | 154thof 2,874 |
| May 2025 | 9231.2 µg/m³ | 135thof 2,826 |
| June 2026 | 9231.2 µg/m³ | 138thof 2,497 |
| July 2024 | 8929.3 µg/m³ | 61stof 2,566 |
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.
Concón's worst days
| Day | US AQI |
|---|---|
| 12 Jul 2025 | 14352.6 µg/m³ |
| 21 Jul 2025 | 13950.9 µg/m³ |
| 16 Jun 2026 | 13348.5 µg/m³ |
| 9 Jun 2025 | 13248.2 µg/m³ |
| 15 May 2026 | 13248.1 µg/m³ |
| 25 May 2025 | 13147.5 µg/m³ |
| 15 Jun 2023 | 12846.5 µg/m³ |
| 21 May 2026 | 12745.9 µg/m³ |
| 22 May 2026 | 12645.7 µg/m³ |
| 15 Jun 2026 | 12545.2 µg/m³ |
Daily means, the highest since 1 Jan 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, Concón, Chile, 1 Jan 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/concon/history (accessed 12 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.
Concón now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 17:07 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).