SmogRank / Chile / Valparaiso / Quillota
Quillota, month by month
Quillota has a measured daily mean on 1,227 days since 1 January 2023. Its worst month was July 2024, at 139 US AQI (50.8 µg/m³), 29th of 2,566 cities on that month's world ranking. Its cleanest was November 2025, at 65 US AQI (16.5 µg/m³). 2025 averaged 78 US AQI (23.7 µg/m³), against 86 US AQI (27.9 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 |
|---|---|
| Jun 2025 | 8 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| May 2025 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 10 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| 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.
Quillota's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 13950.8 µg/m³ | 29thof 2,566 | Chile, July 2024 |
| July 2025 | 11139.4 µg/m³ | 55thof 2,889 | – |
| May 2024 | 10838.2 µg/m³ | 48thof 2,684 | – |
| May 2023 | 10537.0 µg/m³ | 39thof 1,600 | – |
| June 2023 | 10336.3 µg/m³ | 42ndof 1,603 | – |
| June 2024 | 10336.3 µg/m³ | 37thof 2,563 | – |
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.
Quillota's worst days
| Day | US AQI | Episode |
|---|---|---|
| 14 Jul 2024 | 16373.1 µg/m³ | Chile, July 2024 |
| 13 Jul 2025 | 16169.7 µg/m³ | – |
| 29 Jun 2025 | 16068.8 µg/m³ | – |
| 12 Jul 2025 | 16067.7 µg/m³ | – |
| 6 Jul 2024 | 15966.5 µg/m³ | – |
| 16 Jul 2024 | 15866.1 µg/m³ | – |
| 6 Jun 2024 | 15865.8 µg/m³ | – |
| 13 Jul 2024 | 15865.8 µg/m³ | Chile, July 2024 |
| 9 Jul 2024 | 15865.5 µg/m³ | – |
| 16 Jun 2026 | 15865.1 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, Quillota, Chile, 1 Jan 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/quillota/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.
Quillota now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 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).