What is the air quality trend in Lima?

Over the past 7 days, Lima had an average AQI of 63 based on station measurements. The worst day was 2026-07-17 with AQI 99.

How is Lima air quality measured?

Air quality in Lima is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Lima, United States

Name: Lima Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Lima, United States.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

112h

PM2.5 Station

112h · 1 station

Temperature GFS model

28pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-07-21	51	27–122	14.1 µg/m³	11h	1
2026-07-20	79	19–142	25.4 µg/m³	12h	1
2026-07-19	56	15–122	17.1 µg/m³	16h	1
2026-07-18	75	23–160	26.8 µg/m³	14h	1
2026-07-17	99	26–239	55.8 µg/m³	22h	1
2026-07-16	46	24–102	12.3 µg/m³	20h	1
2026-07-15	39	6–102	10.4 µg/m³	17h	1

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