SmogRank / World / South America / Peru / Lima region
Most polluted cities in Lima region, Peru
No city in Lima region, Peru has enough readings to rank for the last 30 days.
A city joins this ranking with enough days of readings over the last 30 days; none here has that right now, so there is nothing to map or chart.
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
Lima region 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.
| City | 7-day estimate |
|---|---|
| Chosica | ≈ 26 µg/m³ |
| Breña | ≈ 13 µg/m³ |
| San Isidro | ≈ 13 µg/m³ |
| Jesus Maria | ≈ 13 µg/m³ |
| Huaral | ≈ 19 µg/m³ |
| Huacho | ≈ 10 µg/m³ |
| Barranca | ≈ 11 µg/m³ |
| Nuevo Imperial | ≈ 9 µg/m³ |
| Imperial | ≈ 9 µg/m³ |
| Paramonga | ≈ 10 µg/m³ |
| Chancay | ≈ 19 µg/m³ |
| Hualmay | ≈ 10 µg/m³ |
| San Vicente de Cañete | ≈ 9 µg/m³ |
| Huaura | ≈ 10 µg/m³ |
| Mala | ≈ 9 µg/m³ |
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.