SmogRank / Chile / Biobio / Lota
Lota, month by month
Lota has a measured daily mean on 872 days since 1 January 2023. Its worst month was July 2024, at 91 US AQI (30.5 µg/m³), 59th of 2,566 cities on that month's world ranking. Its cleanest was December 2024, at 60 US AQI (14.0 µg/m³).
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
21 months
| Month | Why |
|---|---|
| Oct 2026 | 7 of 11 days measured; a month needs 8. The others: 1 with readings for part of the day (a day needs 18 hours), 3 with readings left out by our checks. |
| Jul 2026 | 15 of 31 days measured; a month needs 22. The others: 16 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks. |
| Dec 2025 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Nov 2025 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Oct 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 12 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | No day measured. The others: 1 missing from OpenAQ's archive, 28 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | No day measured. The others: 30 with under 18 hours of readings or readings that failed our checks. |
| Mar 2023 | 9 of 31 days measured; a month needs 22. The others: 20 missing from OpenAQ's archive, 2 with under 18 hours of readings or readings that failed our checks. |
| Feb 2023 | 2 of 28 days measured; a month needs 20. The others: 25 missing from OpenAQ's archive, 1 with under 18 hours of readings or readings that failed our checks. |
| Jan 2023 | 18 of 31 days measured; a month needs 22. The others: 7 missing from OpenAQ's archive, 6 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.
Lota's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 9130.5 µg/m³ | 59thof 2,566 | Southern Chile, July 2024 South-western Chile, July 2024and 2 more |
| June 2026 | 8627.8 µg/m³ | 165thof 2,497 | – |
| May 2023 | 8225.8 µg/m³ | 70thof 1,600 | – |
| June 2023 | 8024.5 µg/m³ | 184thof 1,603 | South-western Chile, June 2023 Southern Chile, June 2023 |
| August 2026 | 7924.3 µg/m³ | 175thof 2,896 | Southern Chile, August 2026 |
| April 2026 | 7923.9 µg/m³ | 327thof 2,941 | – |
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.
Lota's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 May 2026 | 15358.5 µg/m³ | Southern Chile, May 2026 |
| 20 Jul 2024 | 15156.2 µg/m³ | South-western Chile, July 2024 |
| 14 Jun 2023 | 13449.0 µg/m³ | Southern Chile, June 2023 |
| 30 Jul 2024 | 13348.3 µg/m³ | Southern Chile, July 2024 |
| 14 May 2026 | 12545.3 µg/m³ | – |
| 23 Aug 2026 | 12444.8 µg/m³ | Southern Chile, August 2026 |
| 17 Jun 2026 | 12043.1 µg/m³ | – |
| 19 May 2026 | 11942.8 µg/m³ | Southern Chile, May 2026 |
| 31 May 2026 | 11942.8 µg/m³ | – |
| 18 Jun 2023 | 11741.9 µg/m³ | South-western Chile, June 2023 |
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, Lota, Chile, 1 Jan 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/lota/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.
Lota now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 21:07 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).