SmogRank / Chile / Biobio / San Pedro de la Paz
San Pedro de la Paz, month by month
San Pedro de la Paz has a measured daily mean on 1,250 days since 1 January 2023. Its worst month was July 2024, at 102 US AQI (35.8 µg/m³), 50th of 2,566 cities on that month's world ranking. Its cleanest was December 2025, at 64 US AQI (16.1 µg/m³). 2025 averaged 75 US AQI (22.1 µg/m³), against 77 US AQI (22.8 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.
San Pedro de la Paz's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2024 | 10235.8 µg/m³ | 50thof 2,566 | – |
| June 2025 | 9834.3 µg/m³ | 100thof 2,508 | – |
| May 2024 | 9834.2 µg/m³ | 57thof 2,684 | South-western Chile, 14 to 19 May 2024 South-western Chile, 10 to 12 May 2024 |
| May 2026 | 9633.4 µg/m³ | 143rdof 2,874 | Southern Chile, May 2026 South-western Chile, May 2026 |
| June 2026 | 9633.3 µg/m³ | 119thof 2,497 | – |
| May 2025 | 9130.6 µg/m³ | 140thof 2,826 | – |
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.
San Pedro de la Paz's worst days
| Day | US AQI | Episode |
|---|---|---|
| 20 May 2026 | 17386.6 µg/m³ | Southern Chile, May 2026 |
| 24 Aug 2026 | 15864.8 µg/m³ | Southern Chile, August 2026 |
| 8 Jun 2026 | 15764.6 µg/m³ | – |
| 11 Sept 2023 | 15663.2 µg/m³ | – |
| 21 May 2025 | 15662.4 µg/m³ | – |
| 3 Jun 2025 | 15560.8 µg/m³ | – |
| 10 Jun 2025 | 15459.9 µg/m³ | – |
| 18 Jul 2023 | 15358.7 µg/m³ | Southern Chile, July 2023 |
| 7 Jul 2026 | 15358.1 µg/m³ | Southern Chile, July 2026 |
| 24 Jul 2023 | 15357.8 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, San Pedro de la Paz, Chile, 1 Jan 2023 – 11 Oct 2026. Monitor data from Chile - SINCA via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/cl/san-pedro-de-la-paz/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.
San Pedro de la Paz now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 02:07 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).