SmogRank / World / Chile / Valparaiso / October 2025

Most unhealthy days in Valparaiso, Chile, October 2025

6 cities in Valparaiso, Chile ranked by their share of unhealthy days over the 31 days. The most unhealthy days: Concón, Chile, 0 of 22 measured days. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Concón 0% 0.75%0
Every city in Valparaiso, Chile ranked for October 2025, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Concón
    0 of 22
  2. 2Puchuncaví
    0 of 25
  3. 3Quintero
    0 of 25
  4. 4Quilpué
    0 of 23
  5. 5Viña del Mar
    0 of 25
  6. 6Quillota
    0 of 25
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

All cities in the world, October 2025 · All cities in Chile, October 2025 · Valparaiso now

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SmogRank, most polluted cities in Valparaiso, Chile, by unhealthy days, PM2.5, October 2025, smogrank.com/cl/region/valparaiso/history/2025-10?by=days (accessed 7 Oct 2026).

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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.