Air quality in Lima, Lima, Peru today

Mr. Duck’s Air Quality Score

Moderate air today for Lima, Lima, Peru

⚠️ This website is currently under active development. Some data may be incomplete or temporarily inaccurate. For health-critical decisions, please verify information through official government or environmental sources.

Categories follow US EPA AQI breakpoints for PM (estimate from latest valid measurements; this project does not compute EPA NowCast/24-hour AQI yet).

This friendly indicator summarizes the latest city readings. For health guidance, please see: EPA AirNow or WHO.

Air quality today

The air quality in Lima is currently classified as Moderate. The primary pollutant measured is PM2.5 (fine particles). Recent observations show a PM2.5 concentration of 23.72 µg/m³ and a PM10 level of 59.93 µg/m³, based on 19 valid measurements collected through OpenAQ.

These values reflect the present state of ambient air in the city without implying any trend or health implication. This page is informational; for health guidance, use official sources such as EPA AirNow or WHO.

Latest sensor values

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

What the data includes

The dataset for Lima pulls in measurements from five monitoring stations, giving a total of thirty individual rows across the six key pollutants tracked: carbon monoxide (CO), nitrogen dioxide (NO₂, reported in µg/m³), ozone (O₃, µg/m³), particulate matter 10 µm and smaller (PM10, µg/m³), fine particulate matter 2.5 µg/m³ (PM2.5, µg/m³) and sulfur dioxide (SO₂, µg/m³). For most of these gases the newest readings are from 2026‑02‑10 16:00 UTC, meaning they have been refreshed within the last week. CO is an exception: one set of values in parts per million comes from a 2017‑07‑20 reading, and another set expressed in µg/m³ dates back to 2025‑11‑28, so carbon monoxide data are considerably older than the rest.

Across the recent observations, NO₂ spans from a low of 22.9 µg/m³ up to a high of 61.75 µg/m³, with a median around 41.87 µg/m³ and the central 80 % of values falling between roughly 26.6 and 56.9 µg/m³. Ozone shows a narrower band, ranging from 10.81 to 32.65 µg/m³, median 23.11 µg/m³, with most measurements (10th‑90th percentile) between about 15 and 30 µg/m³. PM10 values run from 37.24 to 67.07 µg/m³, median 52.81 µg/m³; the interdecile spread is roughly 41 to 64 µg/m³. Fine particles (PM2.5) are reported between 0 and 23.72 µg/m³, median 19.27 µg/m³, with the bulk of data clustered from about 7.4 to 23.5 µg/m³. Sulfur dioxide is measured from 5.02 up to 27.02 µg/m³, median 8.15 µg/m³, and most values lie between 6 and 20.65 µg/m³.

Because the CO measurements are dated, the overall picture of Lima’s air quality relies heavily on the more recent NO₂, O₃, PM10, PM2.5 and SO₂ data. The dataset captures a moderate range of concentrations for each pollutant, but the limited number of stations means conditions can differ across neighborhoods and times not covered by these rows. Users should keep in mind that while many values are fresh, gaps—especially for carbon monoxide—remain, so the snapshot may not reflect short‑term spikes or localized variations.

Learn more about sources and filtering: About the data.

Trusted references: WHO (Air pollution) · US EPA AirNow · European Environment Agency (Air)

Latest sensor values (bars)

PM categories follow US EPA AQI breakpoints, shown here as an estimate derived from the latest valid measurements (this project does not compute EPA NowCast/24-hour AQI yet).

Data notes

The dataset for Lima includes 19 valid measurements and is Updated within 3 days, with the most recent values recorded at 2026‑02‑10T16:00:00+00:00. These figures represent a snapshot of conditions across the city; air quality can differ by specific location and time of day, so individual experiences may vary from the reported averages.

OpenAQ station rows