Cluj-Napoca: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

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Latest air quality data: Cluj-Napoca

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

particulate matter (PM2.5) dust - 8 (Good)
particulate matter (PM10) suspended dust - 11 (Good)
ozone (O3) - 47 (Good)
nitrogen dioxide (NO2) - 7 (Good)
sulfur dioxide (SO2) - 1 (Good)
carbon monoxide (CO) - 188 (Good)

Real-time Air Quality Index (AQI) for Cluj-Napoca, Thursday, August 27, 2026: 1.

AQI 1 Good

What is the air quality in Cluj-Napoca today? Is the air polluted in Cluj-Napoca?. Is there smog?

Today (Thursday, August 27, 2026) air quality is good. The air quality has no effect on health. Everyone can continue their outdoor activities normally in Cluj-Napoca.

What is the current level of PM2.5 in Cluj-Napoca? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 8 (Good) For comparison, the highest level of PM2.5 in Cluj-Napoca in the last 7 days was: 12 (Friday, August 21, 2026) and the lowest: 3 (Sunday, August 23, 2026).

What is the level of PM10 today in Cluj-Napoca? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Cluj-Napoca is: 11 (Good)

How is the O3 level today in Cluj-Napoca? (ozone (O3))
47 (Good)

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

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

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

Current data Thursday, August 27, 2026 at 4:00 AM

PM2,5 8 (Good)

PM10 11 (Good)

O3 47 (Good)

NO2 7 (Good)

SO2 1 (Good)

CO 188 (Good)

Data on air pollution from recent days in Cluj-Napoca

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
pm25	6 Good	8 Good	7 Good	5 Good	3 Good	8 Good	12 Good	8 Good
pm10	8 Good	10 Good	10 Good	7 Good	5 Good	12 Good	16 Good	10 Good
o3	60 Good	73 Moderate	72 Moderate	70 Moderate	72 Moderate	77 Moderate	83 Moderate	71 Moderate
no2	6 Good	5 Good	6 Good	5 Good	2 Good	3 Good	5 Good	5 Good
so2	1 Good	1 Good	2 Good	1 Good	1 Good	1 Good	3 Good	2 Good
co	177 Good	171 Good	171 Good	158 Good	152 Good	159 Good	182 Good	176 Good

data source »

Quality of life in Cluj-Napoca

Green and Parks in the City

Cluj-Napoca 59%

Moldova: 67% Bulgaria: 66% Serbia: 55% Hungary: 59% Slovakia: 58%

particulate matter PM2.5

Cluj-Napoca 17 (Moderate)

Pleasure of spending time in the city

Cluj-Napoca 68%

Moldova: 56% Bulgaria: 50% Serbia: 53% Hungary: 65% Slovakia: 73%

particulate matter PM10

Cluj-Napoca 28 (Moderate)

Air Pollution

Cluj-Napoca 43%

Moldova: 53% Bulgaria: 68% Serbia: 65% Hungary: 49% Slovakia: 35%

Garbage Disposal

Cluj-Napoca 52%

Moldova: 35% Bulgaria: 44% Serbia: 39% Hungary: 65% Slovakia: 65%

Availability and quality of drinking water

Cluj-Napoca 78%

Moldova: 46% Bulgaria: 70% Serbia: 64% Hungary: 80% Slovakia: 87%

Cleanliness and tidiness

Cluj-Napoca 64%

Moldova: 35% Bulgaria: 42% Serbia: 37% Hungary: 52% Slovakia: 57%

Noise and Light pollution

Cluj-Napoca 34%

Moldova: 53% Bulgaria: 51% Serbia: 51% Hungary: 45% Slovakia: 41%

Water Pollution

Cluj-Napoca 32%

Moldova: 63% Bulgaria: 41% Serbia: 52% Hungary: 30% Slovakia: 27%

Source: Numbeo

Cluj-Napoca

Thursday, August 27, 2026 at 4:00 AM

PM2,5 8.2 (Good)

particulate matter (PM2.5) dust

PM10 11 (Good)

particulate matter (PM10) suspended dust

O3 47 (Good)

ozone (O3)

NO2 6.7 (Good)

nitrogen dioxide (NO2)

SO2 1.3 (Good)

sulfur dioxide (SO2)

CO 188 (Good)

carbon monoxide (CO)

Cluj-Napoca

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	8.1	12	8.2	3.2	4.5	6.6	7.8	6.1
pm10	10	16	12	4.6	7	9.5	10	7.7
o3	71	83	77	72	70	72	73	60
no2	5.3	4.5	2.7	2	4.8	5.6	4.8	6.2
so2	2.1	2.7	1.4	0.63	1.1	1.5	1.4	0.97
co	176	182	159	152	158	171	171	177

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

🌦️ Weather · 16-day Forecast — Romania

16-day weather forecast for Romania: today around 32°C (rain), lows near 15°C. Daily temperature and conditions, updated every day. A moderate breeze (about 13 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — Romania

The UV index in Romania today is 5.9 (moderate) — unprotected fair skin can burn in about 35 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Cluj-Napoca — compare nearby locations.

Bucharest 7 µg/m³
Iași 5 µg/m³
Timișoara 9 µg/m³
Craiova 9 µg/m³
Constanța 7 µg/m³
Galați 7 µg/m³
Brașov 11 µg/m³
Ploieşti 7 µg/m³

Frequently asked questions

Is the air safe to breathe in Cluj-Napoca today?

The current average PM2.5 across Cluj-Napoca is about 8 µg/m³, rated “Good”. Air quality is good — outdoor activities are fine for everyone.

What is the current PM2.5 level in Cluj-Napoca?

Right now PM2.5 in Cluj-Napoca averages about 8 µg/m³ (“Good”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Cluj-Napoca?

Over the past week, the highest daily PM2.5 in Cluj-Napoca was recorded on Friday, August 21 (about 12 µg/m³).

What is the UV index in Cluj-Napoca today?

The UV index in Cluj-Napoca today is 5.9 (moderate) — unprotected fair skin can burn in about 35 minutes.

Does today's wind help disperse smog in Cluj-Napoca?

A moderate breeze (about 13 km/h) is partially dispersing pollutants today.

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.