SmogRank / South Korea / North Chungcheong

Air quality in Okcheon

North Chungcheong, South Korea. PM2.5 from 1 reference monitor, updated hourly. None of them reported in the last 24 hours.

1DAQI
Low

Mean for 1 Oct, the most recent day with readings, 0.7× the WHO 24-hour guideline. No hourly readings have reached us since; some networks publish days late. PM2.5 10.4 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#422of 2,605, at 2 DAQI (13.1 µg/m³)
30 days#71of 2,626, at 9 DAQI (69.5 µg/m³)
This year#48of 2,447, at 10 DAQI (74.3 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were August, November, averaging up to 180.5 µg/m³ against 10.0 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

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

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 21.4 µg/m³2025-11-02: 13.7 µg/m³2025-11-03: 16.7 µg/m³2025-11-04: 20.1 µg/m³2025-11-05: 32.8 µg/m³2025-11-06: 38.2 µg/m³2025-11-07: 38.0 µg/m³2025-11-08: 33.9 µg/m³2025-11-09: 27.0 µg/m³2025-11-10: 12.8 µg/m³2025-11-11: 16.1 µg/m³2025-11-12: 29.7 µg/m³2025-11-13: 35.0 µg/m³2025-11-14: 26.4 µg/m³2025-11-15: 25.9 µg/m³2025-11-16: 23.5 µg/m³2025-11-17: 20.1 µg/m³2025-11-18: 17.9 µg/m³2025-11-19: 20.8 µg/m³2025-11-20: 30.4 µg/m³2025-11-21: 1,260.0 µg/m³2025-11-22: 27.5 µg/m³2025-11-23: 868.0 µg/m³2025-11-24: 883.0 µg/m³2025-11-25: 886.0 µg/m³2025-11-26: 33.2 µg/m³2025-11-27: 26.4 µg/m³2025-11-28: no data2025-11-29: no data2025-11-30: no data2025-12-01: no data2025-12-02: no data2025-12-03: 14.8 µg/m³2025-12-04: 16.8 µg/m³2025-12-05: 19.5 µg/m³2025-12-06: 19.0 µg/m³2025-12-07: 59.4 µg/m³2025-12-08: 26.5 µg/m³2025-12-09: 18.5 µg/m³2025-12-10: 33.0 µg/m³2025-12-11: 37.9 µg/m³2025-12-12: 17.0 µg/m³2025-12-13: 12.1 µg/m³2025-12-14: 20.0 µg/m³2025-12-15: 23.4 µg/m³2025-12-16: 34.8 µg/m³2025-12-17: 45.3 µg/m³2025-12-18: 33.9 µg/m³2025-12-19: 33.8 µg/m³2025-12-20: 469.0 µg/m³2025-12-21: 16.1 µg/m³2025-12-22: 22.9 µg/m³2025-12-23: 29.4 µg/m³2025-12-24: 25.0 µg/m³2025-12-25: 23.4 µg/m³2025-12-26: 12.0 µg/m³2025-12-27: 22.1 µg/m³2025-12-28: 30.3 µg/m³2025-12-29: 61.0 µg/m³2025-12-30: 28.9 µg/m³2025-12-31: 16.7 µg/m³2026-01-01: 14.5 µg/m³2026-01-02: 16.0 µg/m³2026-01-03: 21.8 µg/m³2026-01-04: 42.9 µg/m³2026-01-05: 25.4 µg/m³2026-01-06: 20.9 µg/m³2026-01-07: 33.9 µg/m³2026-01-08: 8.5 µg/m³2026-01-09: 13.4 µg/m³2026-01-10: 24.7 µg/m³2026-01-11: 10.5 µg/m³2026-01-12: 16.8 µg/m³2026-01-13: 22.6 µg/m³2026-01-14: 12.8 µg/m³2026-01-15: 67.4 µg/m³2026-01-16: 72.2 µg/m³2026-01-17: 47.7 µg/m³2026-01-18: 44.7 µg/m³2026-01-19: 28.0 µg/m³2026-01-20: 12.9 µg/m³2026-01-21: 14.2 µg/m³2026-01-22: 12.5 µg/m³2026-01-23: 26.3 µg/m³2026-01-24: 24.5 µg/m³2026-01-25: 10.3 µg/m³2026-01-26: 17.6 µg/m³2026-01-27: 20.8 µg/m³2026-01-28: 13.8 µg/m³2026-01-29: 17.9 µg/m³2026-01-30: 15.8 µg/m³2026-01-31: 27.3 µg/m³2026-02-01: 35.0 µg/m³2026-02-02: 25.9 µg/m³2026-02-03: 23.8 µg/m³2026-02-04: 52.0 µg/m³2026-02-05: 59.2 µg/m³2026-02-06: 24.3 µg/m³2026-02-07: 11.2 µg/m³2026-02-08: 14.3 µg/m³2026-02-09: 11.3 µg/m³2026-02-10: 25.3 µg/m³2026-02-11: 45.0 µg/m³2026-02-12: 53.2 µg/m³2026-02-13: 63.8 µg/m³2026-02-14: 70.3 µg/m³2026-02-15: 40.5 µg/m³2026-02-16: 15.4 µg/m³2026-02-17: 21.8 µg/m³2026-02-18: 19.3 µg/m³2026-02-19: 12.7 µg/m³2026-02-20: 30.8 µg/m³2026-02-21: 39.8 µg/m³2026-02-22: 28.3 µg/m³2026-02-23: 5.9 µg/m³2026-02-24: 12.9 µg/m³2026-02-25: 9.6 µg/m³2026-02-26: 8.4 µg/m³2026-02-27: 8.3 µg/m³2026-02-28: 12.9 µg/m³2026-03-01: 11.4 µg/m³2026-03-02: 4.4 µg/m³2026-03-03: 1.7 µg/m³2026-03-04: 11.6 µg/m³2026-03-05: 24.4 µg/m³2026-03-06: 22.0 µg/m³2026-03-07: 17.6 µg/m³2026-03-08: 18.9 µg/m³2026-03-09: 38.8 µg/m³2026-03-10: 53.3 µg/m³2026-03-11: 37.5 µg/m³2026-03-12: 42.8 µg/m³2026-03-13: 10.3 µg/m³2026-03-14: 17.3 µg/m³2026-03-15: 39.7 µg/m³2026-03-16: 43.0 µg/m³2026-03-17: 38.3 µg/m³2026-03-18: 32.7 µg/m³2026-03-19: 27.2 µg/m³2026-03-20: 22.1 µg/m³2026-03-21: 30.9 µg/m³2026-03-22: 28.3 µg/m³2026-03-23: 27.2 µg/m³2026-03-24: 50.9 µg/m³2026-03-25: 34.1 µg/m³2026-03-26: 33.9 µg/m³2026-03-27: 53.1 µg/m³2026-03-28: 37.2 µg/m³2026-03-29: 23.9 µg/m³2026-03-30: 22.7 µg/m³2026-03-31: 10.0 µg/m³2026-04-01: 15.4 µg/m³2026-04-02: 23.7 µg/m³2026-04-03: 31.3 µg/m³2026-04-04: 10.1 µg/m³2026-04-05: 18.1 µg/m³2026-04-06: 13.6 µg/m³2026-04-07: 7.1 µg/m³2026-04-08: 9.5 µg/m³2026-04-09: 13.5 µg/m³2026-04-10: 11.0 µg/m³2026-04-11: 31.0 µg/m³2026-04-12: 27.5 µg/m³2026-04-13: 11.2 µg/m³2026-04-14: 14.2 µg/m³2026-04-15: 17.8 µg/m³2026-04-16: 10.3 µg/m³2026-04-17: 8.5 µg/m³2026-04-18: 13.4 µg/m³2026-04-19: 11.3 µg/m³2026-04-20: 16.3 µg/m³2026-04-21: 21.3 µg/m³2026-04-22: 12.1 µg/m³2026-04-23: 11.3 µg/m³2026-04-24: 6.3 µg/m³2026-04-25: 8.5 µg/m³2026-04-26: 12.5 µg/m³2026-04-27: 13.0 µg/m³2026-04-28: 12.0 µg/m³2026-04-29: 12.4 µg/m³2026-04-30: 15.1 µg/m³2026-05-01: 11.6 µg/m³2026-05-02: 25.0 µg/m³2026-05-03: 432.0 µg/m³2026-05-04: no data2026-05-05: 9.2 µg/m³2026-05-06: 9.4 µg/m³2026-05-07: 11.8 µg/m³2026-05-08: 842.0 µg/m³2026-05-09: 7.7 µg/m³2026-05-10: 10.3 µg/m³2026-05-11: 7.0 µg/m³2026-05-12: 6.7 µg/m³2026-05-13: 14.3 µg/m³2026-05-14: 18.8 µg/m³2026-05-15: 12.3 µg/m³2026-05-16: 16.5 µg/m³2026-05-17: 16.7 µg/m³2026-05-18: 18.8 µg/m³2026-05-19: 1,270.0 µg/m³2026-05-20: no data2026-05-21: no data2026-05-22: no data2026-05-23: 15.2 µg/m³2026-05-24: 12.8 µg/m³2026-05-25: 16.2 µg/m³2026-05-26: 18.4 µg/m³2026-05-27: 9.4 µg/m³2026-05-28: 7.9 µg/m³2026-05-29: 31.9 µg/m³2026-05-30: 16.8 µg/m³2026-05-31: 16.3 µg/m³2026-06-01: 1,270.0 µg/m³2026-06-02: 21.1 µg/m³2026-06-03: 19.6 µg/m³2026-06-04: 19.3 µg/m³2026-06-05: 9.8 µg/m³2026-06-06: 10.2 µg/m³2026-06-07: 10.4 µg/m³2026-06-08: 16.9 µg/m³2026-06-09: 849.0 µg/m³2026-06-10: 15.8 µg/m³2026-06-11: 13.1 µg/m³2026-06-12: 15.8 µg/m³2026-06-13: 12.7 µg/m³2026-06-14: 16.9 µg/m³2026-06-15: 848.0 µg/m³2026-06-16: 16.8 µg/m³2026-06-17: 12.7 µg/m³2026-06-18: 11.6 µg/m³2026-06-19: 436.0 µg/m³2026-06-20: 422.0 µg/m³2026-06-21: 4.9 µg/m³2026-06-22: 12.3 µg/m³2026-06-23: 11.0 µg/m³2026-06-24: 6.0 µg/m³2026-06-25: 6.9 µg/m³2026-06-26: 15.0 µg/m³2026-06-27: 12.9 µg/m³2026-06-28: 16.5 µg/m³2026-06-29: 16.9 µg/m³2026-06-30: 21.6 µg/m³2026-07-01: 17.8 µg/m³2026-07-02: 1,260.0 µg/m³2026-07-03: 11.7 µg/m³2026-07-04: 19.8 µg/m³2026-07-05: 11.5 µg/m³2026-07-06: 6.5 µg/m³2026-07-07: 10.1 µg/m³2026-07-08: 10.3 µg/m³2026-07-09: 4.5 µg/m³2026-07-10: 9.6 µg/m³2026-07-11: 10.6 µg/m³2026-07-12: 431.0 µg/m³2026-07-13: 11.5 µg/m³2026-07-14: 8.8 µg/m³2026-07-15: 427.0 µg/m³2026-07-16: 21.7 µg/m³2026-07-17: 432.0 µg/m³2026-07-18: 13.0 µg/m³2026-07-19: 8.3 µg/m³2026-07-20: 11.4 µg/m³2026-07-21: 10.1 µg/m³2026-07-22: no data2026-07-23: 12.5 µg/m³2026-07-24: 11.3 µg/m³2026-07-25: 8.5 µg/m³2026-07-26: 5.3 µg/m³2026-07-27: 5.0 µg/m³2026-07-28: 9.3 µg/m³2026-07-29: 5.3 µg/m³2026-07-30: 8.7 µg/m³2026-07-31: 10.7 µg/m³2026-08-01: 20.0 µg/m³2026-08-02: 18.4 µg/m³2026-08-03: 17.4 µg/m³2026-08-04: 16.1 µg/m³2026-08-05: 9.1 µg/m³2026-08-06: 7.7 µg/m³2026-08-07: no data2026-08-08: no data2026-08-09: no data2026-08-10: no data2026-08-11: 6.6 µg/m³2026-08-12: 1,250.0 µg/m³2026-08-13: 4.9 µg/m³2026-08-14: 8.9 µg/m³2026-08-15: 13.5 µg/m³2026-08-16: 8.6 µg/m³2026-08-17: 3.5 µg/m³2026-08-18: 841.0 µg/m³2026-08-19: 15.9 µg/m³2026-08-20: 7.9 µg/m³2026-08-21: 11.2 µg/m³2026-08-22: 430.0 µg/m³2026-08-23: 11.7 µg/m³2026-08-24: 16.9 µg/m³2026-08-25: 11.5 µg/m³2026-08-26: 1,260.0 µg/m³2026-08-27: 25.8 µg/m³2026-08-28: 12.3 µg/m³2026-08-29: 5.3 µg/m³2026-08-30: 420.0 µg/m³2026-08-31: 419.0 µg/m³2026-09-01: 5.1 µg/m³2026-09-02: 424.0 µg/m³2026-09-03: 8.6 µg/m³2026-09-04: 6.8 µg/m³2026-09-05: 6.3 µg/m³2026-09-06: 8.2 µg/m³2026-09-07: 12.2 µg/m³2026-09-08: 9.6 µg/m³2026-09-09: 1,260.0 µg/m³2026-09-10: no data2026-09-11: 8.1 µg/m³2026-09-12: 10.8 µg/m³2026-09-13: 15.7 µg/m³2026-09-14: 25.8 µg/m³2026-09-15: 21.1 µg/m³2026-09-16: 15.5 µg/m³2026-09-17: 7.9 µg/m³2026-09-18: 8.7 µg/m³2026-09-19: 9.4 µg/m³2026-09-20: 9.2 µg/m³2026-09-21: 13.5 µg/m³2026-09-22: 12.1 µg/m³2026-09-23: 11.6 µg/m³2026-09-24: 19.3 µg/m³2026-09-25: 19.1 µg/m³2026-09-26: 9.1 µg/m³2026-09-27: 8.7 µg/m³2026-09-28: 18.9 µg/m³2026-09-29: 13.3 µg/m³2026-09-30: 11.9 µg/m³2026-10-01: 10.4 µg/m³
193 of 350 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Low1–3
Moderate4–6
High7–9
Very high10

The UK's Daily Air Quality Index (1 to 10), PM2.5 bands. Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Where it stood each day

Top 10Top 100#1#10#100#1,000#2,835NovDecJanFebMarAprMayJunJulAugSep#537
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: 27.3 µg/m³Jan 2026: 24.5 µg/m³JanFeb 2025: 18.0 µg/m³Feb 2026: 27.9 µg/m³FebMar 2025: 24.1 µg/m³Mar 2026: 28.0 µg/m³MarApr 2025: 17.9 µg/m³Apr 2026: 14.6 µg/m³AprMay 2025: 16.5 µg/m³May 2026: 106.9 µg/m³MayJun 2025: 15.5 µg/m³Jun 2026: 139.1 µg/m³JunJul 2025: 9.5 µg/m³Jul 2026: 94.1 µg/m³JulAug 2025: 8.7 µg/m³Aug 2026: 180.5 µg/m³AugSep 2025: 5.9 µg/m³Sep 2026: 69.3 µg/m³SepOct 2025: 10.0 µg/m³OctNov 2025: 166.1 µg/m³NovDec 2025: 42.2 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 13.1 µg/m³13.120252025: 9.5 µg/m³9.5
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
옥천읍Permission 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, Okcheon, South Korea, 2 Oct 2025 – 1 Oct 2026, smogrank.com/kr/okcheon (accessed 2 Oct 2026).

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Other cities in South Korea

30-day averages, DAQI. All of South Korea.

Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the UK DAQI PM2.5 sub-index.