Takamatsu, Kagawa, Japan 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
Takamatsu, Kagawa, Japan

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Sep. 1	40	26	22		66
Sep. 2	35	38	22	31	44
Sep. 3	41	44	35	25	25
Sep. 4	27	33	36	27	27
Sep. 5	24	43	28	18	31
Sep. 6	28	57	21	21	31
Sep. 7	33	58	27	33	34
Sep. 8	35	64	28	32	24
Sep. 9	36	47	35	34	32
Sep. 10	37	15	39	32	38
Sep. 11	32	18	20	43	54
Sep. 12	31	28	23	45	46
Sep. 13	32	31	24	45	44
Sep. 14	35	20	25	52	34
Sep. 15	38	14	39	46	32
Sep. 16	42	20	48	40	33
Sep. 17	48	25	48	31	32
Sep. 18	32	34	31	32	32
Sep. 19	30	39	45	24	32
Sep. 20	38	31	70	30	38
Sep. 21	27	27	40	28	35
Sep. 22	29	24	28	22	38
Sep. 23		24	28	24	57
Sep. 24		28	32	47	40
Sep. 25		34	36	37	37
Sep. 26		38	36	54	40
Sep. 27		39	43	54	35
Sep. 28		33	42	34	37
Sep. 29		35	37	30	32
Sep. 30		34	53	35	37

AQI Trends: Highest and Lowest

Highest AQI recorded on

20th Sep 2023

70AQI

Lowest AQI recorded on

15th Sep 2024

14AQI

Same Day Analysis (22nd September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 29 of Good air quality, showing improvement over 2021 on the same day.

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Takamatsu, Kagawa, Japan

AQI

Day

Night

5 AM22nd Sep 2025

6 PM

4 AM23rd Sep 2025

Day time

Avg. Highest Time

5AM22nd Sep

32AQI

Avg. Lowest Time

12PM22nd Sep

18AQI

Night time

Avg. Highest Time

9PM22nd Sep

33AQI

Avg. Lowest Time

7PM22nd Sep

28AQI

In the last 24 hours,

Takamatsu's AQI reached its highest point of 33 at 9 PM during the Night, while the lowest point, 18, was recorded at 12 PM during the Day between 22nd Sep and 23rd Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Takamatsu, Kagawa, Japan

AugSep

24th - 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 - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd

Day

Night

30°C27/32°C

29°C26/32°C

28°C26/31°C

28°C25/31°C

29°C26/32°C

29°C26/33°C

29°C26/32°C

29°C26/31°C

25°C24/26°C

27°C25/31°C

27°C24/30°C

29°C26/32°C

28°C25/31°C

29°C26/32°C

28°C25/32°C

26°C23/29°C

27°C24/30°C

28°C26/31°C

29°C26/32°C

28°C26/31°C

28°C25/31°C

26°C24/30°C

25°C23/27°C

26°C24/28°C

24°C22/28°C

23°C20/25°C

5 AM

11 AM

6 PM

11 PM

4 AM

--°C/°C

Day time

Avg. Highest Time

1 PM - 6 PM

41AQI

6 hours / Day

180 hours / Month

Avg. Lowest Time

9 AM

34AQI

1 hours / Day

30 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 PM to 6 PM (Avg. 41), while the lowest AQI was between 9 AM to 9 AM (Avg. 34).

Night time

Avg. Highest Time

12 AM - 11 PM

39AQI

10 hours / Day

300 hours / Month

Avg. Lowest Time

12 AM - 11 PM

39AQI

10 hours / Day

300 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 39), while the lowest AQI was between 12 AM to 11 PM (Avg. 39).

2025 Days Vs Air Quality
Takamatsu, Kagawa, Japan

2025

70%

185

30%

0.3%

Total number of days with different AQI categories in last 266 days in 2025 (99 days remaining)

Good

185 Days

Moderate

79 Days

Poor

1 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 70%

Health Risk Level:

Low

In 2025, 70% of 266 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.

Annual Air Quality Insights
Takamatsu, Kagawa, Japan

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.

40AQI

42AQI

53AQI

49AQI

44AQI

47AQI

53AQI

47AQI

34AQI

No. of days

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

202546AQI

185

Highest AQI recorded in

July

53AQI

Lowest AQI recorded in

September

34AQI

202438AQI

320

Highest AQI recorded in

April

48AQI

Lowest AQI recorded in

December

32AQI

202340AQI

297

Highest AQI recorded in

April

46AQI

Lowest AQI recorded in

August

28AQI

202240AQI

264

Highest AQI recorded in

May

49AQI

Lowest AQI recorded in

October

33AQI

202137AQI

299

Highest AQI recorded in

June

43AQI

Lowest AQI recorded in

April

33AQI

202037AQI

216

Highest AQI recorded in

August

56AQI

Lowest AQI recorded in

September

29AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2025(Avg.)

46AQI

Least Polluted Year Recorded

2021(Avg.)

37AQI

Takamatsu's annual 2025 AQI (46) shows an average percentage change of 19.1% (worsened AQI) compared to previous years: 2020 (37), 2021 (37), 2022 (40), 2023 (40), 2024 (38).


5 AM	32
6 AM	32
7 AM	32
8 AM	32
9 AM	20
10 AM	18
11 AM	18
12 PM	18
1 PM	20
2 PM	20
3 PM	21
4 PM	24
5 PM	26
6 PM	26
7 PM	28
8 PM	30
9 PM	33
10 PM	32
11 PM	32
12 AM	30
1 AM	31
2 AM	33
3 AM	33
4 AM	32

Takamatsu, Kagawa, Japan Historical Air Quality Analysis

September Air Quality AnalysisTakamatsu, Kagawa, Japan

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025Takamatsu, Kagawa, Japan

Day & Night AQI Trend : Aug - Sep 2025Takamatsu, Kagawa, Japan

2025 Days Vs Air Quality Takamatsu, Kagawa, Japan

Annual Air Quality InsightsTakamatsu, Kagawa, Japan

AQI levels in 2025

No. of days

September Air Quality Analysis
Takamatsu, Kagawa, Japan

Day & Night AQI Trend: 22nd Sep - 23rd Sep 2025
Takamatsu, Kagawa, Japan

Day & Night AQI Trend : Aug - Sep 2025
Takamatsu, Kagawa, Japan

2025 Days Vs Air Quality
Takamatsu, Kagawa, Japan

Annual Air Quality Insights
Takamatsu, Kagawa, Japan