Air Quality in Arequipa Today — Live AQI, PM2.5 & PM10, Smog, Weather and Forecast

Latest air quality data: Arequipa

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Pollution and air quality forecast for Arequipa. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Arequipa:

particulate matter (PM2.5) dust - 27 (Moderate)
particulate matter (PM10) suspended dust - 112 (Very Unhealthy)
ozone (O3) - 41 (Good)
nitrogen dioxide (NO2) - 30 (Good)
sulfur dioxide (SO2) - 6 (Good)
carbon monoxide (CO) - 1395 (Good)

Real-time Air Quality Index (AQI) for Arequipa, Wednesday, August 26, 2026: 5.

AQI 5 Very Unhealthy

What is the air quality in Arequipa today? Is the air polluted in Arequipa?. Is there smog?

Today (Wednesday, August 26, 2026) air quality is very poor in Arequipa. Healthy people will commonly show symptoms of respiratory problem. People with respiratory or heart diseases will be significantly affected by air quality and will experience reduced endurance in in typical outdoor activities. Children, seniors and individuals with heart or lung diseases should stay indoors and avoid outdoor activities in Arequipa. Other residents should reduce outdoor activities.

What is the current level of PM2.5 in Arequipa? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 27 (Moderate) For comparison, the highest level of PM2.5 in Arequipa in the last 7 days was: 37 (Wednesday, August 26, 2026) and the lowest: 19 (Monday, August 24, 2026).

What is the level of PM10 today in Arequipa? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Arequipa is: 112 (Very Unhealthy)

How is the O3 level today in Arequipa? (ozone (O3))
41 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
30 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
6 (Good)

How high is the CO level? (carbon monoxide (CO))
1395 (Good)

Current data Wednesday, August 26, 2026 at 8:00 PM

PM2,5 27 (Moderate)

PM10 112 (Very Unhealthy)

O3 41 (Good)

NO2 30 (Good)

SO2 6 (Good)

CO 1395 (Good)

Data on air pollution from recent days in Arequipa

index	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20	2026-08-19
pm25	37 Unhealthy for Sensitive Groups	28 Moderate	19 Moderate	22 Moderate	24 Moderate	29 Moderate	31 Moderate	24 Moderate
pm10	177 Very bad Hazardous	147 Very Unhealthy	99 Unhealthy	106 Unhealthy	128 Very Unhealthy	146 Very Unhealthy	156 Very bad Hazardous	112 Very Unhealthy
o3	53 Good	52 Good	59 Good	59 Good	47 Good	38 Good	43 Good	42 Good
no2	21 Good	20 Good	13 Good	10 Good	16 Good	24 Good	23 Good	21 Good
so2	4 Good	4 Good	4 Good	4 Good	4 Good	4 Good	4 Good	3 Good
co	578 Good	555 Good	394 Good	326 Good	286 Good	405 Good	500 Good	585 Good

data source »

Arequipa

Wednesday, August 26, 2026 at 8:00 PM

PM2,5 27 (Moderate)

particulate matter (PM2.5) dust

PM10 112 (Very Unhealthy)

particulate matter (PM10) suspended dust

O3 41 (Good)

ozone (O3)

NO2 30 (Good)

nitrogen dioxide (NO2)

SO2 5.6 (Good)

sulfur dioxide (SO2)

CO 1395 (Good)

carbon monoxide (CO)

Arequipa

index	2026-08-19	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26
pm25	24	31	29	24	22	19	28	37
pm10	112	156	146	128	106	99	147	177
o3	42	43	38	47	59	59	52	53
no2	21	23	24	16	10	13	20	21
so2	3.1	3.6	4	4.2	4.3	3.7	4.2	4
co	585	500	405	286	326	394	555	578

* Pollution data source: https://openaq.org () The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — Arequipa

16-day weather forecast for Arequipa: today around 20°C (rain), lows near 12°C. Daily temperature and conditions, updated every day. Strong wind (about 25 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — Arequipa

The UV index in Arequipa today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Arequipa — compare nearby locations.

Puno 3 µg/m³
Juliaca 4 µg/m³
Tacna 14 µg/m³
AricaChile 11 µg/m³
IquiqueChile 4 µg/m³
Ayacucho 4 µg/m³
OruroBolivia 2 µg/m³
Ica 6 µg/m³

Frequently asked questions

Is the air safe to breathe in Arequipa today?

The current average PM2.5 across Arequipa is about 27 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Arequipa?

Right now PM2.5 in Arequipa averages about 27 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Arequipa?

Over the past week, the highest daily PM2.5 in Arequipa was recorded on Wednesday, August 26 (about 37 µg/m³).

What is the UV index in Arequipa today?

The UV index in Arequipa today is 8.8 (very high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Arequipa?

Strong wind (about 25 km/h) is actively clearing smog and dust away.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.