Hongdo, Mokpo, Jeonnam, South Korea Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good

050

Moderate

100

Poor

150

Unhealthy

200

Severe

300

Hazardous

301+

September Air Quality Analysis
Hongdo, Mokpo, Jeonnam, South Korea

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Sep. 1	44	76	55		47
Sep. 2	45	65	58		50
Sep. 3	54	54	30		46
Sep. 4	50	43	44		56
Sep. 5	50	50	66		50
Sep. 6	43	43	72		58
Sep. 7	48	37	56		58
Sep. 8	48	43	50	36	61
Sep. 9	47	52	46		56
Sep. 10	50	64	59	12	50
Sep. 11	46	37	48	13	45
Sep. 12	45	18	47	14	57
Sep. 13	47	16	43	13	71
Sep. 14	47	22	34	20	58
Sep. 15	43	41	34	19	56
Sep. 16	38	32	31	9	56
Sep. 17	44	35	33		60
Sep. 18		38	37		56
Sep. 19		32	32		52
Sep. 20		27	35		56
Sep. 21		23	35	48	67
Sep. 22		36	39	35	85
Sep. 23		29	49	47	55
Sep. 24		36	35	44	53
Sep. 25		38	30	54	52
Sep. 26		44	42	60	55
Sep. 27		82	54	59	58
Sep. 28		70	95	66	50
Sep. 29		49	87	60	44
Sep. 30		42	49	66	44

AQI Trends: Highest and Lowest

Highest AQI recorded on

28th Sep 2023

95AQI

Lowest AQI recorded on

16th Sep 2022

9AQI

Same Day Analysis (17th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 44 of Good air quality, showing improvement over 2021 on the same day.

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Hongdo, Mokpo, Jeonnam, South Korea

AQI

Day

Night

6 AM17th Sep 2025

7 PM

5 AM18th Sep 2025

Day time

Avg. Highest Time

6AM17th Sep

46AQI

Avg. Lowest Time

10AM17th Sep

22AQI

Night time

Avg. Highest Time

3AM18th Sep

50AQI

Avg. Lowest Time

7PM17th Sep

35AQI

In the last 24 hours,

Hongdo's AQI reached its highest point of 50 at 3 AM during the Night, while the lowest point, 22, was recorded at 10 AM during the Day between 17th Sep and 18th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Hongdo, Mokpo, Jeonnam, South Korea

AugSep

19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th

Day

Night

27°C26/28°C

27°C26/29°C

27°C25/29°C

27°C26/29°C

27°C26/28°C

26°C25/27°C

26°C24/28°C

26°C25/28°C

27°C25/29°C

27°C26/29°C

26°C25/28°C

26°C25/27°C

26°C25/29°C

26°C25/28°C

26°C25/27°C

25°C25/26°C

22°C20/25°C

24°C21/25°C

24°C23/27°C

24°C23/25°C

24°C22/25°C

25°C23/26°C

24°C23/25°C

6 AM

12 PM

7 PM

12 AM

5 AM

--°C/°C

Day time

Avg. Highest Time

6 AM - 8 AM

49AQI

3 hours / Day

90 hours / Month

Avg. Lowest Time

7 PM

42AQI

1 hours / Day

30 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 6 AM to 8 AM (Avg. 49), while the lowest AQI was between 7 PM to 7 PM (Avg. 42).

Night time

Avg. Highest Time

12 AM - 5 AM

49AQI

6 hours / Day

180 hours / Month

Avg. Lowest Time

8 PM - 9 PM

45AQI

2 hours / Day

60 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 5 AM (Avg. 49), while the lowest AQI was between 8 PM to 9 PM (Avg. 45).

2025 Days Vs Air Quality
Hongdo, Mokpo, Jeonnam, South Korea

2025

24%

72%

187

Total number of days with different AQI categories in last 261 days in 2025 (104 days remaining)

Good

62 Days

Moderate

187 Days

Poor

11 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 24%

Health Risk Level:

Very high

In 2025, 24% of 261 days were within WHO’s safe air quality limits. The risk of health issues is Very high, including respiratory issues, heart disease, and stress, particularly affecting vulnerable groups.

Annual Air Quality Insights
Hongdo, Mokpo, Jeonnam, South Korea

AQI levels in 2025

AQI

PM2.5

PM10

SO2

NO2

Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

72AQI

81AQI

71AQI

65AQI

59AQI

53AQI

48AQI

46AQI

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202564AQI

187

Highest AQI recorded in

March

81AQI

Lowest AQI recorded in

September

46AQI

202463AQI

122

215

Highest AQI recorded in

April

87AQI

Lowest AQI recorded in

July

33AQI

202366AQI

223

Highest AQI recorded in

December

88AQI

Lowest AQI recorded in

July

44AQI

202263AQI

194

Highest AQI recorded in

February

90AQI

Lowest AQI recorded in

September

38AQI

202165AQI

162

Highest AQI recorded in

April

96AQI

Lowest AQI recorded in

July

45AQI

Most & Least Polluted Years Over the Last 5 Years

Most Polluted Year Recorded

2023(Avg.)

66AQI

Least Polluted Year Recorded

2022(Avg.)

63AQI

Hongdo's annual 2025 AQI (64) shows an average percentage change of -0.8% (improved AQI) compared to previous years: 2021 (65), 2022 (63), 2023 (66), 2024 (63).


6 AM	46
7 AM	46
8 AM	46
9 AM	26
10 AM	22
11 AM	25
12 PM	34
1 PM	33
2 PM	28
3 PM	34
4 PM	30
5 PM	32
6 PM	38
7 PM	35
8 PM	43
9 PM	45
10 PM	45
11 PM	44
12 AM	45
1 AM	48
2 AM	49
3 AM	50
4 AM	47
5 AM	43

Hongdo, Mokpo, Jeonnam, South Korea Historical Air Quality Analysis

September Air Quality AnalysisHongdo, Mokpo, Jeonnam, South Korea

Day & Night AQI Trend: 17th Sep - 18th Sep 2025Hongdo, Mokpo, Jeonnam, South Korea

Day & Night AQI Trend : Aug - Sep 2025Hongdo, Mokpo, Jeonnam, South Korea

2025 Days Vs Air Quality Hongdo, Mokpo, Jeonnam, South Korea

Annual Air Quality InsightsHongdo, Mokpo, Jeonnam, South Korea

AQI levels in 2025

No. of days

September Air Quality Analysis
Hongdo, Mokpo, Jeonnam, South Korea

Day & Night AQI Trend: 17th Sep - 18th Sep 2025
Hongdo, Mokpo, Jeonnam, South Korea

Day & Night AQI Trend : Aug - Sep 2025
Hongdo, Mokpo, Jeonnam, South Korea

2025 Days Vs Air Quality
Hongdo, Mokpo, Jeonnam, South Korea

Annual Air Quality Insights
Hongdo, Mokpo, Jeonnam, South Korea