SmogRank / South Korea / Gyeonggi-do

Air quality in Icheon-si

Gyeonggi-do, South Korea. PM2.5 from 2 reference monitors, updated hourly. Only 1 of them reported in the last 24 hours.

53US AQI
Moderate

Latest hour (12:00 UTC), 0.7× the WHO 24-hour guideline. PM2.5 10.0 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#368of 2,604, at 60 US AQI (14.0 µg/m³)
30 days#499of 2,622, at 55 US AQI (11.5 µg/m³)
This year#417of 2,444, at 67 US AQI (17.9 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were June, July, August, September, averaging up to 112.3 µg/m³ against 9.5 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Icheon-si's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

Bad-air episodes that reached Icheon-si

Times when Icheon-si and many cities around it had PM2.5 at twice their usual or more on the same days. All episodes.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 13.3 µg/m³2025-11-02: 8.7 µg/m³2025-11-03: 10.5 µg/m³2025-11-04: 21.2 µg/m³2025-11-05: 31.4 µg/m³2025-11-06: 34.7 µg/m³2025-11-07: 32.2 µg/m³2025-11-08: 22.4 µg/m³2025-11-09: 18.8 µg/m³2025-11-10: 6.2 µg/m³2025-11-11: 13.1 µg/m³2025-11-12: 22.9 µg/m³2025-11-13: 29.3 µg/m³2025-11-14: 22.2 µg/m³2025-11-15: 20.7 µg/m³2025-11-16: 26.2 µg/m³2025-11-17: 11.0 µg/m³2025-11-18: 8.6 µg/m³2025-11-19: 15.6 µg/m³2025-11-20: 235.1 µg/m³2025-11-21: 7.4 µg/m³2025-11-22: 20.6 µg/m³2025-11-23: 35.0 µg/m³2025-11-24: 55.1 µg/m³2025-11-25: 55.9 µg/m³2025-11-26: 32.1 µg/m³2025-11-27: 232.0 µg/m³2025-11-28: 10.9 µg/m³2025-11-29: 435.2 µg/m³2025-11-30: 32.1 µg/m³2025-12-01: 854.0 µg/m³2025-12-02: 5.9 µg/m³2025-12-03: 5.1 µg/m³2025-12-04: 10.3 µg/m³2025-12-05: 15.0 µg/m³2025-12-06: 24.2 µg/m³2025-12-07: 46.9 µg/m³2025-12-08: 16.5 µg/m³2025-12-09: 17.4 µg/m³2025-12-10: 241.0 µg/m³2025-12-11: 26.1 µg/m³2025-12-12: 426.8 µg/m³2025-12-13: 7.9 µg/m³2025-12-14: 15.8 µg/m³2025-12-15: 28.5 µg/m³2025-12-16: 35.2 µg/m³2025-12-17: 38.9 µg/m³2025-12-18: 40.0 µg/m³2025-12-19: 39.7 µg/m³2025-12-20: 46.7 µg/m³2025-12-21: 6.0 µg/m³2025-12-22: 12.7 µg/m³2025-12-23: 21.2 µg/m³2025-12-24: 16.3 µg/m³2025-12-25: 13.9 µg/m³2025-12-26: 5.6 µg/m³2025-12-27: 15.5 µg/m³2025-12-28: 29.9 µg/m³2025-12-29: 50.8 µg/m³2025-12-30: 8.1 µg/m³2025-12-31: 6.3 µg/m³2026-01-01: 5.6 µg/m³2026-01-02: 10.4 µg/m³2026-01-03: 21.5 µg/m³2026-01-04: 29.2 µg/m³2026-01-05: 15.9 µg/m³2026-01-06: 22.5 µg/m³2026-01-07: 18.7 µg/m³2026-01-08: 8.7 µg/m³2026-01-09: 21.9 µg/m³2026-01-10: 21.9 µg/m³2026-01-11: 7.3 µg/m³2026-01-12: 16.6 µg/m³2026-01-13: 14.1 µg/m³2026-01-14: 12.2 µg/m³2026-01-15: 44.2 µg/m³2026-01-16: 72.1 µg/m³2026-01-17: 45.3 µg/m³2026-01-18: 37.3 µg/m³2026-01-19: 19.5 µg/m³2026-01-20: 10.5 µg/m³2026-01-21: 9.4 µg/m³2026-01-22: 8.2 µg/m³2026-01-23: 14.2 µg/m³2026-01-24: 8.6 µg/m³2026-01-25: 8.7 µg/m³2026-01-26: 23.4 µg/m³2026-01-27: 19.0 µg/m³2026-01-28: 9.9 µg/m³2026-01-29: 12.7 µg/m³2026-01-30: 16.8 µg/m³2026-01-31: 22.3 µg/m³2026-02-01: 21.7 µg/m³2026-02-02: 22.0 µg/m³2026-02-03: 29.3 µg/m³2026-02-04: 55.9 µg/m³2026-02-05: 72.6 µg/m³2026-02-06: 11.6 µg/m³2026-02-07: 8.8 µg/m³2026-02-08: 11.4 µg/m³2026-02-09: 17.0 µg/m³2026-02-10: 37.7 µg/m³2026-02-11: 55.5 µg/m³2026-02-12: 55.6 µg/m³2026-02-13: 70.3 µg/m³2026-02-14: no data2026-02-15: 11.0 µg/m³2026-02-16: 14.8 µg/m³2026-02-17: 18.0 µg/m³2026-02-18: 17.6 µg/m³2026-02-19: 17.1 µg/m³2026-02-20: 38.1 µg/m³2026-02-21: 42.7 µg/m³2026-02-22: 26.2 µg/m³2026-02-23: 6.2 µg/m³2026-02-24: 13.4 µg/m³2026-02-25: 16.5 µg/m³2026-02-26: 12.2 µg/m³2026-02-27: 6.6 µg/m³2026-02-28: 9.1 µg/m³2026-03-01: 11.9 µg/m³2026-03-02: 2.8 µg/m³2026-03-03: 1.1 µg/m³2026-03-04: 10.9 µg/m³2026-03-05: 29.9 µg/m³2026-03-06: 28.0 µg/m³2026-03-07: 17.6 µg/m³2026-03-08: 18.8 µg/m³2026-03-09: 35.8 µg/m³2026-03-10: 45.1 µg/m³2026-03-11: 34.2 µg/m³2026-03-12: 30.8 µg/m³2026-03-13: 10.6 µg/m³2026-03-14: 17.3 µg/m³2026-03-15: 32.8 µg/m³2026-03-16: 45.2 µg/m³2026-03-17: 51.1 µg/m³2026-03-18: 49.8 µg/m³2026-03-19: 20.8 µg/m³2026-03-20: 24.5 µg/m³2026-03-21: 35.8 µg/m³2026-03-22: 28.0 µg/m³2026-03-23: 32.6 µg/m³2026-03-24: 34.8 µg/m³2026-03-25: 29.4 µg/m³2026-03-26: 43.4 µg/m³2026-03-27: 55.6 µg/m³2026-03-28: 48.0 µg/m³2026-03-29: 31.1 µg/m³2026-03-30: 38.1 µg/m³2026-03-31: 10.2 µg/m³2026-04-01: 17.7 µg/m³2026-04-02: 35.0 µg/m³2026-04-03: 43.8 µg/m³2026-04-04: 15.3 µg/m³2026-04-05: 22.7 µg/m³2026-04-06: 13.9 µg/m³2026-04-07: 4.7 µg/m³2026-04-08: 18.6 µg/m³2026-04-09: 20.9 µg/m³2026-04-10: 15.2 µg/m³2026-04-11: 27.7 µg/m³2026-04-12: 26.9 µg/m³2026-04-13: 24.7 µg/m³2026-04-14: 17.4 µg/m³2026-04-15: 23.0 µg/m³2026-04-16: 8.6 µg/m³2026-04-17: 11.3 µg/m³2026-04-18: 19.9 µg/m³2026-04-19: 23.5 µg/m³2026-04-20: 23.5 µg/m³2026-04-21: 21.1 µg/m³2026-04-22: 16.3 µg/m³2026-04-23: 11.5 µg/m³2026-04-24: 10.8 µg/m³2026-04-25: 18.4 µg/m³2026-04-26: 11.8 µg/m³2026-04-27: 17.9 µg/m³2026-04-28: 14.9 µg/m³2026-04-29: 15.2 µg/m³2026-04-30: 13.8 µg/m³2026-05-01: 14.4 µg/m³2026-05-02: 37.0 µg/m³2026-05-03: 15.3 µg/m³2026-05-04: 7.4 µg/m³2026-05-05: 11.0 µg/m³2026-05-06: 11.0 µg/m³2026-05-07: 16.0 µg/m³2026-05-08: 426.0 µg/m³2026-05-09: 13.1 µg/m³2026-05-10: 10.6 µg/m³2026-05-11: 426.7 µg/m³2026-05-12: 222.5 µg/m³2026-05-13: 18.8 µg/m³2026-05-14: 16.8 µg/m³2026-05-15: 19.0 µg/m³2026-05-16: 22.2 µg/m³2026-05-17: 19.6 µg/m³2026-05-18: 19.7 µg/m³2026-05-19: 25.7 µg/m³2026-05-20: 430.3 µg/m³2026-05-21: 219.6 µg/m³2026-05-22: 7.7 µg/m³2026-05-23: 11.8 µg/m³2026-05-24: 14.5 µg/m³2026-05-25: 17.9 µg/m³2026-05-26: 18.3 µg/m³2026-05-27: 13.2 µg/m³2026-05-28: 10.2 µg/m³2026-05-29: 439.0 µg/m³2026-05-30: 19.4 µg/m³2026-05-31: 17.3 µg/m³2026-06-01: 15.4 µg/m³2026-06-02: 22.2 µg/m³2026-06-03: 233.5 µg/m³2026-06-04: 25.7 µg/m³2026-06-05: 7.8 µg/m³2026-06-06: 10.7 µg/m³2026-06-07: 9.9 µg/m³2026-06-08: 15.5 µg/m³2026-06-09: 637.0 µg/m³2026-06-10: 18.7 µg/m³2026-06-11: 25.5 µg/m³2026-06-12: 17.6 µg/m³2026-06-13: 16.1 µg/m³2026-06-14: 17.5 µg/m³2026-06-15: 13.5 µg/m³2026-06-16: 223.7 µg/m³2026-06-17: 16.3 µg/m³2026-06-18: 21.3 µg/m³2026-06-19: 231.0 µg/m³2026-06-20: 6.6 µg/m³2026-06-21: 6.2 µg/m³2026-06-22: 10.6 µg/m³2026-06-23: 634.6 µg/m³2026-06-24: 6.3 µg/m³2026-06-25: 7.2 µg/m³2026-06-26: 421.9 µg/m³2026-06-27: 9.9 µg/m³2026-06-28: 435.1 µg/m³2026-06-29: 228.5 µg/m³2026-06-30: 23.0 µg/m³2026-07-01: 16.7 µg/m³2026-07-02: 14.3 µg/m³2026-07-03: 14.9 µg/m³2026-07-04: 21.9 µg/m³2026-07-05: 14.9 µg/m³2026-07-06: 12.1 µg/m³2026-07-07: 219.6 µg/m³2026-07-08: 10.6 µg/m³2026-07-09: 6.1 µg/m³2026-07-10: 10.6 µg/m³2026-07-11: 222.0 µg/m³2026-07-12: 16.7 µg/m³2026-07-13: 428.0 µg/m³2026-07-14: 425.0 µg/m³2026-07-15: 12.6 µg/m³2026-07-16: 233.8 µg/m³2026-07-17: 27.4 µg/m³2026-07-18: 214.3 µg/m³2026-07-19: 8.2 µg/m³2026-07-20: 9.7 µg/m³2026-07-21: 7.5 µg/m³2026-07-22: 7.6 µg/m³2026-07-23: 13.5 µg/m³2026-07-24: 13.4 µg/m³2026-07-25: 217.8 µg/m³2026-07-26: 6.9 µg/m³2026-07-27: 10.3 µg/m³2026-07-28: 639.0 µg/m³2026-07-29: 8.3 µg/m³2026-07-30: 8.9 µg/m³2026-07-31: 14.1 µg/m³2026-08-01: 22.2 µg/m³2026-08-02: 226.2 µg/m³2026-08-03: 16.5 µg/m³2026-08-04: 428.5 µg/m³2026-08-05: 10.1 µg/m³2026-08-06: 9.6 µg/m³2026-08-07: 219.7 µg/m³2026-08-08: 6.3 µg/m³2026-08-09: 3.9 µg/m³2026-08-10: 5.2 µg/m³2026-08-11: 5.3 µg/m³2026-08-12: 4.0 µg/m³2026-08-13: 4.8 µg/m³2026-08-14: 420.0 µg/m³2026-08-15: 9.9 µg/m³2026-08-16: 11.0 µg/m³2026-08-17: 7.0 µg/m³2026-08-18: 14.8 µg/m³2026-08-19: 23.5 µg/m³2026-08-20: 446.0 µg/m³2026-08-21: 18.2 µg/m³2026-08-22: 4.7 µg/m³2026-08-23: 217.3 µg/m³2026-08-24: 18.4 µg/m³2026-08-25: 10.8 µg/m³2026-08-26: 639.5 µg/m³2026-08-27: 19.3 µg/m³2026-08-28: 15.2 µg/m³2026-08-29: 12.8 µg/m³2026-08-30: 13.0 µg/m³2026-08-31: 6.1 µg/m³2026-09-01: 3.4 µg/m³2026-09-02: 843.0 µg/m³2026-09-03: 9.1 µg/m³2026-09-04: 5.7 µg/m³2026-09-05: 3.7 µg/m³2026-09-06: 4.2 µg/m³2026-09-07: 5.4 µg/m³2026-09-08: 7.0 µg/m³2026-09-09: 3.2 µg/m³2026-09-10: 4.0 µg/m³2026-09-11: 424.0 µg/m³2026-09-12: 12.0 µg/m³2026-09-13: 17.5 µg/m³2026-09-14: 26.2 µg/m³2026-09-15: 14.5 µg/m³2026-09-16: 12.8 µg/m³2026-09-17: 8.9 µg/m³2026-09-18: 421.5 µg/m³2026-09-19: 7.0 µg/m³2026-09-20: 10.0 µg/m³2026-09-21: 12.1 µg/m³2026-09-22: 725.7 µg/m³2026-09-23: 14.9 µg/m³2026-09-24: 23.6 µg/m³2026-09-25: 16.7 µg/m³2026-09-26: 8.0 µg/m³2026-09-27: 12.2 µg/m³2026-09-28: 18.1 µg/m³2026-09-29: 16.6 µg/m³2026-09-30: 19.7 µg/m³2026-10-01: 6.7 µg/m³
204 of 364 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Last 4 days, hour by hour

15302026-10-02 00:00 UTC: 9.0 µg/m³2026-10-02 01:00 UTC: 14.0 µg/m³2026-10-02 02:00 UTC: 8.0 µg/m³2026-10-02 03:00 UTC: 4.0 µg/m³2026-10-02 04:00 UTC: 7.0 µg/m³2026-10-02 05:00 UTC: 6.0 µg/m³2026-10-02 06:00 UTC: 7.0 µg/m³2026-10-02 07:00 UTC: 5.0 µg/m³2026-10-02 08:00 UTC: 3.0 µg/m³2026-10-02 09:00 UTC: 6.0 µg/m³2026-10-02 10:00 UTC: 6.0 µg/m³2026-10-02 11:00 UTC: 9.0 µg/m³2026-10-02 12:00 UTC: 10.0 µg/m³Sep 29Sep 30Oct 1Oct 2
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,835NovDecJanFebMarAprMayJunJulAugSep#131
Its rank on each day's world board, #1 being the most polluted city that day. The scale is logarithmic: each step down is ten times as many cities. See it among every city.

2026 against 2025, month by month

15Jan 2025: 31.6 µg/m³Jan 2026: 19.6 µg/m³JanFeb 2025: 20.5 µg/m³Feb 2026: 26.6 µg/m³FebMar 2025: 27.9 µg/m³Mar 2026: 29.2 µg/m³MarApr 2025: 20.4 µg/m³Apr 2026: 18.9 µg/m³AprMay 2025: 18.6 µg/m³May 2026: 83.0 µg/m³MayJun 2025: 19.4 µg/m³Jun 2026: 112.3 µg/m³JunJul 2025: 14.2 µg/m³Jul 2026: 93.1 µg/m³JulAug 2025: 15.3 µg/m³Aug 2026: 92.6 µg/m³AugSep 2025: 10.9 µg/m³Sep 2026: 90.4 µg/m³SepOct 2025: 10.5 µg/m³OctNov 2025: 50.7 µg/m³NovDec 2025: 68.7 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 14.0 µg/m³14.020252025: 18.6 µg/m³18.620242024: 9.8 µg/m³9.8
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
부발읍Permission requested (AirKorea, 2026-10-01)Korea Air Ministry of EnvironmentReference
창전동Permission requested (AirKorea, 2026-10-01)Korea Air Ministry of EnvironmentReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Use this page

SmogRank, PM2.5 daily means, Icheon-si, South Korea, 2 Oct 2025 – 1 Oct 2026, smogrank.com/kr/icheon-si (accessed 2 Oct 2026).

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Other cities in South Korea

30-day averages, US AQI. All of South Korea.

Updated 2026-10-02 13:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.