SmogRank / World / South America / Chile / Valparaiso

Most polluted cities in Valparaiso, Chile

6 measured cities, this year; 6 above the WHO annual guideline. Worst: Quilpué at 26.2 µg/m³, #245 in the world.

About 42.9K people in these 4 cities breathed unhealthy air on an average day so far this year.

Ranked by people: each city's population times its share of unhealthy days, those with a daily mean over 35.4 µg/m³ (US AQI 101+). That is how many people living there breathed unhealthy air on an average day. Only cities measured at 2 or more places at least 3 km apart are ranked: one monitor shouldn't speak for a whole city. Population is the city itself, not its wider metro area.

Santiago Metropolitan: 3 measured citiesCoquimbo Region: 2 measured citiesValparaiso: 6 measured citiesO'Higgins Region: 2 measured cities#6 Viña del Mar: 22.5 µg/m³#4 Quintero: 23.9 µg/m³#5 Concón: 23.9 µg/m³#3 Puchuncaví: 24.0 µg/m³#2 Quillota: 24.1 µg/m³#1 Quilpué: 26.2 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Viña del Mar 31.7K 30K0
Every measured city in Valparaiso, Chile with monitors in two or more places, one column each, ranked by people breathing unhealthy air: height is people on an average day, colour its average. Point at it to read a city; tap to open it.
  1. 1Viña del Mar 31.7K
  2. 2Quillota 8.44K
  3. 3Quintero 2.24K
  4. 4Puchuncaví 461
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

Estimated: cities without a monitor

Valparaiso cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Valparaíso≈ 14 µg/m³Moderate
Villa Alemana≈ 17 µg/m³Moderate
San Antonio≈ 16 µg/m³Moderate
Los Andes≈ 7 µg/m³Good
San Felipe≈ 20 µg/m³Moderate
La Calera≈ 23 µg/m³Moderate
Limache≈ 17 µg/m³Moderate
La Ligua≈ 19 µg/m³Moderate
Casablanca≈ 14 µg/m³Moderate
Cabildo≈ 19 µg/m³Moderate
Cartagena≈ 16 µg/m³Moderate
La Cruz≈ 23 µg/m³Moderate
San Esteban≈ 7 µg/m³Good
El Quisco≈ 14 µg/m³Moderate
Putaendo≈ 20 µg/m³Moderate

Bad-air episodes in Valparaiso

Times when many cities around here had PM2.5 at twice their usual or more on the same days.

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SmogRank, most polluted cities in Valparaiso, Chile, PM2.5, this year to 6 Oct 2026, 22:00 UTC, smogrank.com/cl/region/valparaiso?w=year.

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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.

Updated 2026-10-06 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.