SmogRank / South Korea / Gyeongsangnam-do

Air quality in Sinhyeon

Gyeongsangnam-do, South Korea. PM2.5 from 2 reference monitors, updated hourly.

55US AQI
Moderate

Latest hour (03:00 UTC), 0.8× the WHO 24-hour guideline. PM2.5 11.5 µg/m³.

Rank, worst first

24 hours–not enough data
7 days#422of 2,605, at 58 US AQI (13.1 µg/m³)
30 days#11of 2,626, at 219 US AQI (143.3 µg/m³)
This year#3of 2,447, at 220 US AQI (144.8 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were August, averaging up to 392.3 µg/m³ against 11.3 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Sinhyeon'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: 15.2 µg/m³2025-11-02: 13.5 µg/m³2025-11-03: 14.7 µg/m³2025-11-04: 18.3 µg/m³2025-11-05: 19.4 µg/m³2025-11-06: 25.0 µg/m³2025-11-07: 20.5 µg/m³2025-11-08: 14.8 µg/m³2025-11-09: 15.6 µg/m³2025-11-10: 14.4 µg/m³2025-11-11: 11.5 µg/m³2025-11-12: 14.2 µg/m³2025-11-13: 15.7 µg/m³2025-11-14: 23.7 µg/m³2025-11-15: 18.0 µg/m³2025-11-16: 15.5 µg/m³2025-11-17: 17.5 µg/m³2025-11-18: 17.2 µg/m³2025-11-19: 15.9 µg/m³2025-11-20: 434.6 µg/m³2025-11-21: 15.8 µg/m³2025-11-22: 15.3 µg/m³2025-11-23: 19.4 µg/m³2025-11-24: 24.5 µg/m³2025-11-25: 243.3 µg/m³2025-11-26: 235.1 µg/m³2025-11-27: 17.1 µg/m³2025-11-28: 12.3 µg/m³2025-11-29: 11.5 µg/m³2025-11-30: 10.4 µg/m³2025-12-01: 445.3 µg/m³2025-12-02: 18.9 µg/m³2025-12-03: 11.2 µg/m³2025-12-04: 11.2 µg/m³2025-12-05: 12.3 µg/m³2025-12-06: 12.5 µg/m³2025-12-07: 33.4 µg/m³2025-12-08: 441.6 µg/m³2025-12-09: 221.3 µg/m³2025-12-10: 24.5 µg/m³2025-12-11: 22.5 µg/m³2025-12-12: 841.0 µg/m³2025-12-13: 4.6 µg/m³2025-12-14: 7.5 µg/m³2025-12-15: 12.0 µg/m³2025-12-16: 18.5 µg/m³2025-12-17: 26.4 µg/m³2025-12-18: 18.5 µg/m³2025-12-19: 21.2 µg/m³2025-12-20: 22.5 µg/m³2025-12-21: 22.3 µg/m³2025-12-22: 12.7 µg/m³2025-12-23: 16.3 µg/m³2025-12-24: 15.1 µg/m³2025-12-25: 12.1 µg/m³2025-12-26: 7.8 µg/m³2025-12-27: 17.3 µg/m³2025-12-28: 13.4 µg/m³2025-12-29: 20.5 µg/m³2025-12-30: 25.9 µg/m³2025-12-31: 12.9 µg/m³2026-01-01: 7.1 µg/m³2026-01-02: 9.6 µg/m³2026-01-03: 12.8 µg/m³2026-01-04: 28.1 µg/m³2026-01-05: 16.2 µg/m³2026-01-06: 12.4 µg/m³2026-01-07: 22.4 µg/m³2026-01-08: 11.2 µg/m³2026-01-09: 11.0 µg/m³2026-01-10: 19.6 µg/m³2026-01-11: 10.1 µg/m³2026-01-12: 11.8 µg/m³2026-01-13: 18.2 µg/m³2026-01-14: 11.0 µg/m³2026-01-15: 25.3 µg/m³2026-01-16: 30.8 µg/m³2026-01-17: 32.8 µg/m³2026-01-18: 26.4 µg/m³2026-01-19: 25.6 µg/m³2026-01-20: 8.9 µg/m³2026-01-21: 8.8 µg/m³2026-01-22: 7.6 µg/m³2026-01-23: 17.0 µg/m³2026-01-24: 20.9 µg/m³2026-01-25: 13.7 µg/m³2026-01-26: 13.8 µg/m³2026-01-27: 17.7 µg/m³2026-01-28: 11.1 µg/m³2026-01-29: 21.0 µg/m³2026-01-30: 9.6 µg/m³2026-01-31: 12.5 µg/m³2026-02-01: 24.7 µg/m³2026-02-02: 21.0 µg/m³2026-02-03: 14.6 µg/m³2026-02-04: 24.7 µg/m³2026-02-05: 26.3 µg/m³2026-02-06: 21.7 µg/m³2026-02-07: 8.5 µg/m³2026-02-08: 10.6 µg/m³2026-02-09: 11.3 µg/m³2026-02-10: 20.6 µg/m³2026-02-11: 27.4 µg/m³2026-02-12: 33.4 µg/m³2026-02-13: 39.6 µg/m³2026-02-14: 26.7 µg/m³2026-02-15: 32.5 µg/m³2026-02-16: 20.1 µg/m³2026-02-17: 13.1 µg/m³2026-02-18: 24.9 µg/m³2026-02-19: 19.5 µg/m³2026-02-20: 29.7 µg/m³2026-02-21: 32.1 µg/m³2026-02-22: 26.5 µg/m³2026-02-23: 14.1 µg/m³2026-02-24: 11.9 µg/m³2026-02-25: 12.8 µg/m³2026-02-26: 13.1 µg/m³2026-02-27: 16.2 µg/m³2026-02-28: 16.7 µg/m³2026-03-01: 16.4 µg/m³2026-03-02: 10.3 µg/m³2026-03-03: 10.4 µg/m³2026-03-04: 13.8 µg/m³2026-03-05: 15.2 µg/m³2026-03-06: 15.9 µg/m³2026-03-07: 25.5 µg/m³2026-03-08: 14.7 µg/m³2026-03-09: 30.0 µg/m³2026-03-10: 42.4 µg/m³2026-03-11: 31.2 µg/m³2026-03-12: 24.4 µg/m³2026-03-13: 15.7 µg/m³2026-03-14: 16.6 µg/m³2026-03-15: 25.0 µg/m³2026-03-16: 30.2 µg/m³2026-03-17: 26.1 µg/m³2026-03-18: 24.8 µg/m³2026-03-19: 33.2 µg/m³2026-03-20: 13.9 µg/m³2026-03-21: 20.4 µg/m³2026-03-22: 14.5 µg/m³2026-03-23: 25.5 µg/m³2026-03-24: 56.3 µg/m³2026-03-25: 34.0 µg/m³2026-03-26: 34.5 µg/m³2026-03-27: 43.1 µg/m³2026-03-28: 40.8 µg/m³2026-03-29: 34.0 µg/m³2026-03-30: 33.9 µg/m³2026-03-31: 14.3 µg/m³2026-04-01: 28.7 µg/m³2026-04-02: 28.0 µg/m³2026-04-03: 34.1 µg/m³2026-04-04: 12.5 µg/m³2026-04-05: 22.8 µg/m³2026-04-06: 27.6 µg/m³2026-04-07: 10.8 µg/m³2026-04-08: 13.8 µg/m³2026-04-09: 15.4 µg/m³2026-04-10: 18.2 µg/m³2026-04-11: 20.0 µg/m³2026-04-12: 21.4 µg/m³2026-04-13: 25.8 µg/m³2026-04-14: 28.9 µg/m³2026-04-15: 24.8 µg/m³2026-04-16: 17.5 µg/m³2026-04-17: 22.8 µg/m³2026-04-18: 19.0 µg/m³2026-04-19: 18.8 µg/m³2026-04-20: 19.2 µg/m³2026-04-21: 22.0 µg/m³2026-04-22: 21.4 µg/m³2026-04-23: 19.3 µg/m³2026-04-24: 16.5 µg/m³2026-04-25: 19.9 µg/m³2026-04-26: 21.1 µg/m³2026-04-27: 21.6 µg/m³2026-04-28: 20.8 µg/m³2026-04-29: 18.5 µg/m³2026-04-30: 11.2 µg/m³2026-05-01: 20.7 µg/m³2026-05-02: 28.1 µg/m³2026-05-03: 643.0 µg/m³2026-05-04: 431.8 µg/m³2026-05-05: 16.7 µg/m³2026-05-06: 14.5 µg/m³2026-05-07: 227.0 µg/m³2026-05-08: 639.3 µg/m³2026-05-09: 15.2 µg/m³2026-05-10: 428.8 µg/m³2026-05-11: 17.7 µg/m³2026-05-12: 635.5 µg/m³2026-05-13: 643.4 µg/m³2026-05-14: 21.8 µg/m³2026-05-15: 850.0 µg/m³2026-05-16: 18.8 µg/m³2026-05-17: 234.5 µg/m³2026-05-18: 233.2 µg/m³2026-05-19: 26.6 µg/m³2026-05-20: 438.1 µg/m³2026-05-21: 666.5 µg/m³2026-05-22: 17.7 µg/m³2026-05-23: 16.6 µg/m³2026-05-24: 16.6 µg/m³2026-05-25: 17.3 µg/m³2026-05-26: 18.0 µg/m³2026-05-27: 633.5 µg/m³2026-05-28: 14.1 µg/m³2026-05-29: 22.7 µg/m³2026-05-30: 22.6 µg/m³2026-05-31: 22.0 µg/m³2026-06-01: 236.3 µg/m³2026-06-02: 426.7 µg/m³2026-06-03: 220.3 µg/m³2026-06-04: 221.5 µg/m³2026-06-05: 223.4 µg/m³2026-06-06: 11.9 µg/m³2026-06-07: 427.4 µg/m³2026-06-08: 17.5 µg/m³2026-06-09: 17.6 µg/m³2026-06-10: 223.8 µg/m³2026-06-11: 16.3 µg/m³2026-06-12: 15.5 µg/m³2026-06-13: 18.1 µg/m³2026-06-14: 18.3 µg/m³2026-06-15: 18.5 µg/m³2026-06-16: 14.0 µg/m³2026-06-17: 13.5 µg/m³2026-06-18: 428.8 µg/m³2026-06-19: 16.5 µg/m³2026-06-20: 217.5 µg/m³2026-06-21: 634.8 µg/m³2026-06-22: 1,051.0 µg/m³2026-06-23: 423.5 µg/m³2026-06-24: 8.3 µg/m³2026-06-25: 11.5 µg/m³2026-06-26: 427.3 µg/m³2026-06-27: 11.5 µg/m³2026-06-28: 15.4 µg/m³2026-06-29: 430.0 µg/m³2026-06-30: 10.2 µg/m³2026-07-01: 9.9 µg/m³2026-07-02: 13.1 µg/m³2026-07-03: 12.0 µg/m³2026-07-04: 7.7 µg/m³2026-07-05: 217.7 µg/m³2026-07-06: 7.6 µg/m³2026-07-07: 1,052.0 µg/m³2026-07-08: 5.7 µg/m³2026-07-09: 216.1 µg/m³2026-07-10: 218.4 µg/m³2026-07-11: 430.3 µg/m³2026-07-12: 13.2 µg/m³2026-07-13: 426.7 µg/m³2026-07-14: 8.7 µg/m³2026-07-15: 14.9 µg/m³2026-07-16: 433.1 µg/m³2026-07-17: 16.5 µg/m³2026-07-18: 15.5 µg/m³2026-07-19: 224.2 µg/m³2026-07-20: 15.6 µg/m³2026-07-21: 426.7 µg/m³2026-07-22: 218.8 µg/m³2026-07-23: 221.2 µg/m³2026-07-24: 846.0 µg/m³2026-07-25: 635.3 µg/m³2026-07-26: 12.6 µg/m³2026-07-27: 12.9 µg/m³2026-07-28: 426.0 µg/m³2026-07-29: 12.2 µg/m³2026-07-30: 219.4 µg/m³2026-07-31: 428.0 µg/m³2026-08-01: 848.0 µg/m³2026-08-02: 1,270.0 µg/m³2026-08-03: 1,260.0 µg/m³2026-08-04: 224.3 µg/m³2026-08-05: 7.5 µg/m³2026-08-06: 7.4 µg/m³2026-08-07: 8.5 µg/m³2026-08-08: 8.0 µg/m³2026-08-09: 634.3 µg/m³2026-08-10: 423.9 µg/m³2026-08-11: 839.0 µg/m³2026-08-12: 8.4 µg/m³2026-08-13: 9.8 µg/m³2026-08-14: 427.3 µg/m³2026-08-15: 220.4 µg/m³2026-08-16: 216.9 µg/m³2026-08-17: 837.5 µg/m³2026-08-18: 1,255.0 µg/m³2026-08-19: 8.0 µg/m³2026-08-20: 14.2 µg/m³2026-08-21: 636.0 µg/m³2026-08-22: 635.5 µg/m³2026-08-23: 433.5 µg/m³2026-08-24: 20.5 µg/m³2026-08-25: 228.4 µg/m³2026-08-26: 17.4 µg/m³2026-08-27: no data2026-08-28: 632.7 µg/m³2026-08-29: 627.6 µg/m³2026-08-30: 4.4 µg/m³2026-08-31: 4.8 µg/m³2026-09-01: 1,260.0 µg/m³2026-09-02: 428.0 µg/m³2026-09-03: 636.5 µg/m³2026-09-04: 8.6 µg/m³2026-09-05: 6.3 µg/m³2026-09-06: 12.6 µg/m³2026-09-07: 637.0 µg/m³2026-09-08: 426.0 µg/m³2026-09-09: 10.5 µg/m³2026-09-10: 9.5 µg/m³2026-09-11: 8.6 µg/m³2026-09-12: 425.5 µg/m³2026-09-13: 427.2 µg/m³2026-09-14: 15.8 µg/m³2026-09-15: 15.7 µg/m³2026-09-16: 217.9 µg/m³2026-09-17: 7.3 µg/m³2026-09-18: 633.5 µg/m³2026-09-19: 10.9 µg/m³2026-09-20: 220.1 µg/m³2026-09-21: 13.6 µg/m³2026-09-22: 12.6 µg/m³2026-09-23: 9.5 µg/m³2026-09-24: 14.3 µg/m³2026-09-25: 17.8 µg/m³2026-09-26: 9.0 µg/m³2026-09-27: 11.9 µg/m³2026-09-28: 14.0 µg/m³2026-09-29: 13.5 µg/m³2026-09-30: 10.4 µg/m³2026-10-01: 14.9 µg/m³
231 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: 7.0 µg/m³2026-10-02 01:00 UTC: 11.5 µg/m³2026-10-02 02:00 UTC: 12.0 µg/m³2026-10-02 03:00 UTC: 11.5 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#718
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: 19.0 µg/m³Jan 2026: 16.3 µg/m³JanFeb 2025: 13.9 µg/m³Feb 2026: 21.2 µg/m³FebMar 2025: 15.6 µg/m³Mar 2026: 25.4 µg/m³MarApr 2025: 14.2 µg/m³Apr 2026: 20.7 µg/m³AprMay 2025: 13.7 µg/m³May 2026: 227.5 µg/m³MayJun 2025: 14.4 µg/m³Jun 2026: 194.2 µg/m³JunJul 2025: 13.0 µg/m³Jul 2026: 219.9 µg/m³JulAug 2025: 12.9 µg/m³Aug 2026: 392.3 µg/m³AugSep 2025: 9.5 µg/m³Sep 2026: 184.8 µg/m³SepOct 2025: 11.4 µg/m³OctNov 2025: 45.3 µg/m³NovDec 2025: 77.5 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: 10.5 µg/m³10.5
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
고현동Permission requested (AirKorea, 2026-10-01)Korea Air Ministry of EnvironmentReference
옥포항Permission 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, Sinhyeon, South Korea, 2 Oct 2025 – 1 Oct 2026, smogrank.com/kr/sinhyeon (accessed 2 Oct 2026).

Download chart (PNG)Embed a live widget

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Other cities in South Korea

30-day averages, US AQI. 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 US AQI PM2.5 sub-index.