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

2 weather warnings in effect for South Korea 🌡️ Extreme heat💨 Strong wind

Latest air quality data: Ansan-si

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

particulate matter (PM2.5) dust - 18 (Moderate)
particulate matter (PM10) suspended dust - 18 (Good)
ozone (O3) - 17 (Good)
nitrogen dioxide (NO2) - 52 (Moderate)
sulfur dioxide (SO2) - 45 (Good)
carbon monoxide (CO) - 141 (Good)

Real-time Air Quality Index (AQI) for Ansan-si, Thursday, August 27, 2026: 2.

AQI 2 Moderate

What is the air quality in Ansan-si today? Is the air polluted in Ansan-si?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderate in Ansan-si. Some pollutants in Ansan-si may slightly affect very few hypersensitive individuals. Air pollutants in Ansan-si may cause minor breathing discomfort to sensitive people.

What is the current level of PM2.5 in Ansan-si? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 18 (Moderate) For comparison, the highest level of PM2.5 in Ansan-si in the last 7 days was: 29 (Friday, August 21, 2026) and the lowest: 10 (Tuesday, August 25, 2026).

What is the level of PM10 today in Ansan-si? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Ansan-si is: 18 (Good)

How is the O3 level today in Ansan-si? (ozone (O3))
17 (Good)

How high is the level of NO2? (nitrogen dioxide (NO2))
52 (Moderate)

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

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

Current data Thursday, August 27, 2026 at 10:00 AM

PM2,5 18 (Moderate)

PM10 18 (Good)

O3 17 (Good)

NO2 52 (Moderate)

SO2 45 (Good)

CO 141 (Good)

Data on air pollution from recent days in Ansan-si

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	22 Moderate	18 Moderate	10 Good	23 Moderate	16 Moderate	15 Moderate	29 Moderate	23 Moderate
pm10	23 Moderate	20 Moderate	13 Good	23 Moderate	17 Good	15 Good	30 Moderate	25 Moderate
o3	20 Good	21 Good	34 Good	37 Good	42 Good	25 Good	11 Good	26 Good
no2	54 Moderate	49 Moderate	30 Good	40 Moderate	35 Good	42 Moderate	66 Moderate	63 Moderate
so2	35 Good	29 Good	12 Good	26 Good	18 Good	15 Good	25 Good	29 Good
co	224 Good	368 Good	209 Good	319 Good	280 Good	259 Good	392 Good	427 Good

data source »

Quality of life in Ansan-si

Green and Parks in the City

Ansan-si 58%

Japan: 65% Taiwan: 53% Hong Kong: 52%

particulate matter PM2.5

Ansan-si 26 (Moderate)

Pleasure of spending time in the city

Ansan-si 25%

North Korea: 44% Japan: 69% Taiwan: 47% Hong Kong: 43%

particulate matter PM10

Ansan-si 57 (Unhealthy for Sensitive Groups)

Air Pollution

Ansan-si 93%

North Korea: 44% Japan: 33% Taiwan: 61% Hong Kong: 67%

Garbage Disposal

Ansan-si 56%

North Korea: 47% Japan: 71% Taiwan: 65% Hong Kong: 52%

Availability and quality of drinking water

Ansan-si 50%

North Korea: 47% Japan: 73% Taiwan: 54% Hong Kong: 66%

Cleanliness and tidiness

Ansan-si 38%

North Korea: 58% Japan: 74% Taiwan: 56% Hong Kong: 54%

Noise and Light pollution

Ansan-si 63%

North Korea: 33% Japan: 44% Taiwan: 59% Hong Kong: 66%

Water Pollution

Ansan-si 58%

North Korea: 56% Japan: 36% Taiwan: 58% Hong Kong: 53%

Source: Numbeo

Ansan-si

Thursday, August 27, 2026 at 10:00 AM

PM2,5 18 (Moderate)

particulate matter (PM2.5) dust

PM10 18 (Good)

particulate matter (PM10) suspended dust

O3 17 (Good)

ozone (O3)

NO2 52 (Moderate)

nitrogen dioxide (NO2)

SO2 45 (Good)

sulfur dioxide (SO2)

CO 141 (Good)

carbon monoxide (CO)

Ansan-si

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	23	29	15	16	23	10	18	22
pm10	25	30	15	17	23	13	20	23
o3	26	11	25	42	37	34	21	20
no2	63	66	42	35	40	30	49	54
so2	29	25	15	18	26	12	29	35
co	427	392	259	280	319	209	368	224

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

🌦️ Weather · 16-day Forecast — South Korea

16-day weather forecast for South Korea: today around 32°C (cloudy), lows near 21°C. Daily temperature and conditions, updated every day. A moderate breeze (about 7 km/h) is partially dispersing pollutants today.

☀️ UV Index · 16-day Forecast — South Korea

The UV index in South Korea today is 7.4 (high) — unprotected fair skin can burn in about 25 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Ansan-si — compare nearby locations.

Seoul 12 µg/m³
Busan 8 µg/m³
Incheon 12 µg/m³
Daegu 12 µg/m³
Daejeon 28 µg/m³
Gwangju 10 µg/m³
Suwon 27 µg/m³
Goyang 12 µg/m³

Frequently asked questions

Is the air safe to breathe in Ansan-si today?

The current average PM2.5 across Ansan-si is about 18 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 Ansan-si?

Right now PM2.5 in Ansan-si averages about 18 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 Ansan-si?

Over the past week, the highest daily PM2.5 in Ansan-si was recorded on Friday, August 21 (about 29 µg/m³).

What is the UV index in Ansan-si today?

The UV index in Ansan-si today is 7.4 (high) — unprotected fair skin can burn in about 25 minutes.

Does today's wind help disperse smog in Ansan-si?

A moderate breeze (about 7 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.