SmogRank / South Korea / Chungcheongnam-do

Air quality in Tangjin

Chungcheongnam-do, South Korea. PM2.5 from 3 reference monitors, updated hourly. Only 1 of them reported in the last 24 hours.

8.0µg/m³
Fair

Latest hour (03:00 UTC), 0.5× the WHO 24-hour guideline.

Rank, worst first

24 hours–not enough data
7 days#365of 2,605, at 14.0 µg/m³
30 days#33of 2,626, at 101.0 µg/m³
This year#12of 2,447, at 105.0 µg/m³

Why it ranks here

Seasonal. Over the past year its worst months were August, averaging up to 221.6 µg/m³ against 12.6 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Tangjin'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: 16.5 µg/m³2025-11-02: 15.8 µg/m³2025-11-03: 14.0 µg/m³2025-11-04: 26.5 µg/m³2025-11-05: 32.5 µg/m³2025-11-06: 40.0 µg/m³2025-11-07: 51.7 µg/m³2025-11-08: 26.6 µg/m³2025-11-09: 31.0 µg/m³2025-11-10: 7.5 µg/m³2025-11-11: 11.0 µg/m³2025-11-12: 24.8 µg/m³2025-11-13: 23.4 µg/m³2025-11-14: 14.2 µg/m³2025-11-15: 24.0 µg/m³2025-11-16: 31.6 µg/m³2025-11-17: 19.6 µg/m³2025-11-18: 11.0 µg/m³2025-11-19: 432.3 µg/m³2025-11-20: 22.4 µg/m³2025-11-21: 8.0 µg/m³2025-11-22: no data2025-11-23: 26.3 µg/m³2025-11-24: 55.1 µg/m³2025-11-25: 467.3 µg/m³2025-11-26: 441.4 µg/m³2025-11-27: 17.9 µg/m³2025-11-28: 11.5 µg/m³2025-11-29: 12.7 µg/m³2025-11-30: 24.4 µg/m³2025-12-01: 438.0 µg/m³2025-12-02: 10.7 µg/m³2025-12-03: 8.1 µg/m³2025-12-04: 11.9 µg/m³2025-12-05: 13.5 µg/m³2025-12-06: 13.1 µg/m³2025-12-07: 55.9 µg/m³2025-12-08: 227.1 µg/m³2025-12-09: 13.4 µg/m³2025-12-10: 18.9 µg/m³2025-12-11: 28.1 µg/m³2025-12-12: 431.8 µg/m³2025-12-13: 9.0 µg/m³2025-12-14: 16.8 µg/m³2025-12-15: 19.4 µg/m³2025-12-16: 21.8 µg/m³2025-12-17: 37.6 µg/m³2025-12-18: 20.5 µg/m³2025-12-19: 32.4 µg/m³2025-12-20: 32.0 µg/m³2025-12-21: 12.2 µg/m³2025-12-22: 14.9 µg/m³2025-12-23: 17.6 µg/m³2025-12-24: 18.8 µg/m³2025-12-25: 17.7 µg/m³2025-12-26: 10.5 µg/m³2025-12-27: 14.8 µg/m³2025-12-28: 19.7 µg/m³2025-12-29: 46.5 µg/m³2025-12-30: 9.5 µg/m³2025-12-31: 10.8 µg/m³2026-01-01: 9.0 µg/m³2026-01-02: 11.3 µg/m³2026-01-03: 14.8 µg/m³2026-01-04: 29.2 µg/m³2026-01-05: 20.0 µg/m³2026-01-06: 14.3 µg/m³2026-01-07: 22.8 µg/m³2026-01-08: 11.6 µg/m³2026-01-09: 9.6 µg/m³2026-01-10: 23.7 µg/m³2026-01-11: 12.9 µg/m³2026-01-12: 10.9 µg/m³2026-01-13: 20.8 µg/m³2026-01-14: 11.1 µg/m³2026-01-15: 54.3 µg/m³2026-01-16: 55.5 µg/m³2026-01-17: 40.1 µg/m³2026-01-18: 35.1 µg/m³2026-01-19: 27.5 µg/m³2026-01-20: 5.9 µg/m³2026-01-21: 12.1 µg/m³2026-01-22: 10.1 µg/m³2026-01-23: 19.2 µg/m³2026-01-24: 18.6 µg/m³2026-01-25: 8.9 µg/m³2026-01-26: 13.2 µg/m³2026-01-27: 19.3 µg/m³2026-01-28: 10.7 µg/m³2026-01-29: 15.4 µg/m³2026-01-30: 17.2 µg/m³2026-01-31: 19.8 µg/m³2026-02-01: 27.0 µg/m³2026-02-02: 24.0 µg/m³2026-02-03: 20.7 µg/m³2026-02-04: 34.3 µg/m³2026-02-05: 47.8 µg/m³2026-02-06: 15.5 µg/m³2026-02-07: 11.5 µg/m³2026-02-08: 14.4 µg/m³2026-02-09: 14.2 µg/m³2026-02-10: 23.4 µg/m³2026-02-11: 49.1 µg/m³2026-02-12: 34.5 µg/m³2026-02-13: 56.0 µg/m³2026-02-14: 66.6 µg/m³2026-02-15: 42.1 µg/m³2026-02-16: 15.5 µg/m³2026-02-17: 12.7 µg/m³2026-02-18: 22.5 µg/m³2026-02-19: 11.0 µg/m³2026-02-20: 32.7 µg/m³2026-02-21: 29.0 µg/m³2026-02-22: 20.6 µg/m³2026-02-23: 7.5 µg/m³2026-02-24: 14.3 µg/m³2026-02-25: 24.7 µg/m³2026-02-26: 13.2 µg/m³2026-02-27: 13.4 µg/m³2026-02-28: 20.1 µg/m³2026-03-01: 13.7 µg/m³2026-03-02: 4.5 µg/m³2026-03-03: 7.9 µg/m³2026-03-04: 16.5 µg/m³2026-03-05: 33.2 µg/m³2026-03-06: 21.3 µg/m³2026-03-07: 17.1 µg/m³2026-03-08: 16.7 µg/m³2026-03-09: 37.1 µg/m³2026-03-10: 26.1 µg/m³2026-03-11: 31.7 µg/m³2026-03-12: 43.5 µg/m³2026-03-13: 20.9 µg/m³2026-03-14: 25.9 µg/m³2026-03-15: 35.2 µg/m³2026-03-16: 57.6 µg/m³2026-03-17: 59.6 µg/m³2026-03-18: 46.1 µg/m³2026-03-19: 11.7 µg/m³2026-03-20: 20.6 µg/m³2026-03-21: 33.8 µg/m³2026-03-22: 37.0 µg/m³2026-03-23: 47.5 µg/m³2026-03-24: 46.8 µg/m³2026-03-25: 35.2 µg/m³2026-03-26: 34.8 µg/m³2026-03-27: 35.7 µg/m³2026-03-28: 46.3 µg/m³2026-03-29: 46.4 µg/m³2026-03-30: 47.6 µg/m³2026-03-31: 36.3 µg/m³2026-04-01: 31.9 µg/m³2026-04-02: 42.3 µg/m³2026-04-03: 43.0 µg/m³2026-04-04: 19.8 µg/m³2026-04-05: 25.6 µg/m³2026-04-06: 22.5 µg/m³2026-04-07: 8.4 µg/m³2026-04-08: 15.6 µg/m³2026-04-09: 19.6 µg/m³2026-04-10: 15.0 µg/m³2026-04-11: 37.5 µg/m³2026-04-12: 31.6 µg/m³2026-04-13: 34.5 µg/m³2026-04-14: 40.2 µg/m³2026-04-15: 45.5 µg/m³2026-04-16: 27.9 µg/m³2026-04-17: 22.2 µg/m³2026-04-18: 22.0 µg/m³2026-04-19: 25.3 µg/m³2026-04-20: 24.5 µg/m³2026-04-21: 22.1 µg/m³2026-04-22: 19.7 µg/m³2026-04-23: 18.7 µg/m³2026-04-24: 14.5 µg/m³2026-04-25: 22.1 µg/m³2026-04-26: 20.8 µg/m³2026-04-27: 16.3 µg/m³2026-04-28: 14.8 µg/m³2026-04-29: 17.4 µg/m³2026-04-30: 226.0 µg/m³2026-05-01: 23.3 µg/m³2026-05-02: 45.0 µg/m³2026-05-03: 21.8 µg/m³2026-05-04: 635.0 µg/m³2026-05-05: 13.5 µg/m³2026-05-06: 9.7 µg/m³2026-05-07: 13.5 µg/m³2026-05-08: 427.7 µg/m³2026-05-09: 10.8 µg/m³2026-05-10: 8.5 µg/m³2026-05-11: 10.0 µg/m³2026-05-12: 1,050.0 µg/m³2026-05-13: 15.9 µg/m³2026-05-14: 444.5 µg/m³2026-05-15: 235.6 µg/m³2026-05-16: 18.5 µg/m³2026-05-17: 20.1 µg/m³2026-05-18: 19.8 µg/m³2026-05-19: 25.5 µg/m³2026-05-20: 18.8 µg/m³2026-05-21: 439.1 µg/m³2026-05-22: 840.0 µg/m³2026-05-23: 19.0 µg/m³2026-05-24: 28.1 µg/m³2026-05-25: 32.0 µg/m³2026-05-26: 851.0 µg/m³2026-05-27: 9.9 µg/m³2026-05-28: 15.8 µg/m³2026-05-29: 33.3 µg/m³2026-05-30: 20.8 µg/m³2026-05-31: 18.7 µg/m³2026-06-01: 16.2 µg/m³2026-06-02: 28.3 µg/m³2026-06-03: 27.0 µg/m³2026-06-04: 21.6 µg/m³2026-06-05: 216.5 µg/m³2026-06-06: 431.2 µg/m³2026-06-07: 12.6 µg/m³2026-06-08: 15.5 µg/m³2026-06-09: 10.4 µg/m³2026-06-10: 847.0 µg/m³2026-06-11: 18.6 µg/m³2026-06-12: 18.8 µg/m³2026-06-13: 16.2 µg/m³2026-06-14: 16.6 µg/m³2026-06-15: 225.3 µg/m³2026-06-16: 1,060.5 µg/m³2026-06-17: 26.8 µg/m³2026-06-18: 229.0 µg/m³2026-06-19: 24.3 µg/m³2026-06-20: 630.5 µg/m³2026-06-21: 8.6 µg/m³2026-06-22: 12.2 µg/m³2026-06-23: 218.8 µg/m³2026-06-24: 420.5 µg/m³2026-06-25: 425.2 µg/m³2026-06-26: 221.1 µg/m³2026-06-27: 18.4 µg/m³2026-06-28: 14.9 µg/m³2026-06-29: 15.6 µg/m³2026-06-30: 15.2 µg/m³2026-07-01: 846.5 µg/m³2026-07-02: 13.2 µg/m³2026-07-03: 8.0 µg/m³2026-07-04: 14.4 µg/m³2026-07-05: 10.4 µg/m³2026-07-06: 428.4 µg/m³2026-07-07: 9.8 µg/m³2026-07-08: 5.4 µg/m³2026-07-09: 3.8 µg/m³2026-07-10: 6.8 µg/m³2026-07-11: 11.8 µg/m³2026-07-12: 14.5 µg/m³2026-07-13: 8.5 µg/m³2026-07-14: 5.3 µg/m³2026-07-15: 843.0 µg/m³2026-07-16: 13.5 µg/m³2026-07-17: 20.6 µg/m³2026-07-18: 9.5 µg/m³2026-07-19: 7.1 µg/m³2026-07-20: 424.1 µg/m³2026-07-21: 421.4 µg/m³2026-07-22: 8.4 µg/m³2026-07-23: 13.1 µg/m³2026-07-24: 427.8 µg/m³2026-07-25: 7.5 µg/m³2026-07-26: 213.6 µg/m³2026-07-27: 7.0 µg/m³2026-07-28: 14.8 µg/m³2026-07-29: 4.4 µg/m³2026-07-30: 5.3 µg/m³2026-07-31: 9.7 µg/m³2026-08-01: 19.4 µg/m³2026-08-02: 9.4 µg/m³2026-08-03: 14.1 µg/m³2026-08-04: 20.5 µg/m³2026-08-05: 15.3 µg/m³2026-08-06: 19.0 µg/m³2026-08-07: no data2026-08-08: 16.8 µg/m³2026-08-09: 5.7 µg/m³2026-08-10: 837.5 µg/m³2026-08-11: 217.6 µg/m³2026-08-12: 214.3 µg/m³2026-08-13: 14.0 µg/m³2026-08-14: 17.7 µg/m³2026-08-15: 27.6 µg/m³2026-08-16: 15.1 µg/m³2026-08-17: 426.4 µg/m³2026-08-18: 18.7 µg/m³2026-08-19: 435.0 µg/m³2026-08-20: 225.1 µg/m³2026-08-21: 850.5 µg/m³2026-08-22: 10.4 µg/m³2026-08-23: 9.8 µg/m³2026-08-24: 13.5 µg/m³2026-08-25: 9.6 µg/m³2026-08-26: 634.0 µg/m³2026-08-27: 10.9 µg/m³2026-08-28: 1,260.0 µg/m³2026-08-29: 844.0 µg/m³2026-08-30: 14.3 µg/m³2026-08-31: 422.0 µg/m³2026-09-01: 1,250.0 µg/m³2026-09-02: no data2026-09-03: 854.0 µg/m³2026-09-04: 9.4 µg/m³2026-09-05: 6.4 µg/m³2026-09-06: 6.3 µg/m³2026-09-07: 8.8 µg/m³2026-09-08: 13.5 µg/m³2026-09-09: 422.0 µg/m³2026-09-10: 5.4 µg/m³2026-09-11: 11.4 µg/m³2026-09-12: 19.7 µg/m³2026-09-13: 26.7 µg/m³2026-09-14: 18.6 µg/m³2026-09-15: 635.0 µg/m³2026-09-16: 15.3 µg/m³2026-09-17: 8.0 µg/m³2026-09-18: 7.3 µg/m³2026-09-19: 8.9 µg/m³2026-09-20: 12.6 µg/m³2026-09-21: 687.0 µg/m³2026-09-22: 18.6 µg/m³2026-09-23: 19.0 µg/m³2026-09-24: 18.2 µg/m³2026-09-25: 18.2 µg/m³2026-09-26: 11.2 µg/m³2026-09-27: 14.0 µg/m³2026-09-28: 15.9 µg/m³2026-09-29: 17.3 µg/m³2026-09-30: 13.2 µg/m³2026-10-01: 8.2 µg/m³
228 of 362 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–5
Fair6–15
Moderate16–50
Poor51–90
Very poor91–140
Extremely poor141+

The European Environment Agency's air quality index bands for PM2.5 (2024 revision); it has bands, not numbers, so values stay in µg/m³. 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: 8.0 µg/m³2026-10-02 01:00 UTC: 8.0 µg/m³2026-10-02 02:00 UTC: 11.0 µg/m³2026-10-02 03:00 UTC: 8.0 µg/m³Sep 29Sep 30Oct 1
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#426
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: 24.5 µg/m³Jan 2026: 19.5 µg/m³JanFeb 2025: 20.5 µg/m³Feb 2026: 25.7 µg/m³FebMar 2025: 29.9 µg/m³Mar 2026: 32.1 µg/m³MarApr 2025: 23.3 µg/m³Apr 2026: 31.6 µg/m³AprMay 2025: 21.3 µg/m³May 2026: 173.4 µg/m³MayJun 2025: 18.8 µg/m³Jun 2026: 175.4 µg/m³JunJul 2025: 17.0 µg/m³Jul 2026: 123.8 µg/m³JulAug 2025: 10.3 µg/m³Aug 2026: 221.6 µg/m³AugSep 2025: 9.9 µg/m³Sep 2026: 143.9 µg/m³SepOct 2025: 13.0 µg/m³OctNov 2025: 66.9 µg/m³NovDec 2025: 53.3 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: 16.3 µg/m³16.3
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
당진시청사Permission requested (AirKorea, 2026-10-01)Korea Air Ministry of EnvironmentReference
당진시청사Permission requested (AirKorea, 2026-10-01)Korea Air Ministry of EnvironmentReference
송산면Permission 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, Tangjin, South Korea, 2 Oct 2025 – 1 Oct 2026, smogrank.com/kr/tangjin (accessed 2 Oct 2026).

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Other cities in South Korea

30-day averages, µg/m³. All of South Korea.

Updated 2026-10-02 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors in µg/m³.