Ozu, Kumamoto, 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+

July Air Quality Analysis
Ozu, Kumamoto, Japan

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Jul. 1	62	17	23	66	33
Jul. 2	66	21	25	32	48
Jul. 3		26	30	14	52
Jul. 4		25	25	13	31
Jul. 5		24	33	40	32
Jul. 6		21	58	56	31
Jul. 7		22	48	56	31
Jul. 8		22	49	46	31
Jul. 9		21	52	39	25
Jul. 10		23	42	55	26
Jul. 11		27	47	70	22
Jul. 12		32	21		21
Jul. 13		22	29	39	19
Jul. 14		18	67	37	24
Jul. 15		17	34	35	38
Jul. 16		20	50	34	33
Jul. 17		35	42	48	26
Jul. 18		38	51	35	20
Jul. 19		25	30	25	19
Jul. 20		20	25	29	25
Jul. 21		26	49	34	22
Jul. 22		47	57		20
Jul. 23		48	60	57	19
Jul. 24		44	38	55	25
Jul. 25		29	28		23
Jul. 26		16	54		22
Jul. 27		32	61		44
Jul. 28		47	53		53
Jul. 29		38	42		65
Jul. 30		30	23		62
Jul. 31		32	25		49

AQI Trends: Highest and Lowest

Highest AQI recorded on

11th Jul 2022

70AQI

Lowest AQI recorded on

4th Jul 2022

13AQI

Same Day Analysis (2nd July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 66 of Moderate air quality on the same day.

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Ozu, Kumamoto, Japan

AQI

Day

Night

5 AM2nd Jul 2025

7 PM

4 AM3rd Jul 2025

Day time

Avg. Highest Time

11AM2nd Jul

108AQI

Avg. Lowest Time

6AM2nd Jul

50AQI

Night time

Avg. Highest Time

8PM2nd Jul

82AQI

Avg. Lowest Time

4AM3rd Jul

53AQI

In the last 24 hours,

Ozu's AQI reached its highest point of 108 at 11 AM during the Day, while the lowest point, 50, was recorded at 6 AM during the Day between 2nd Jul and 3rd Jul 2025.

Day & Night AQI Trend : Jun - Jul 2025
Ozu, Kumamoto, Japan

JunJul

03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd

Day

Night

19°C17/22°C

20°C15/26°C

21°C15/27°C

21°C16/27°C

22°C18/28°C

20°C18/22°C

19°C19/20°C

23°C22/24°C

22°C20/25°C

21°C20/23°C

24°C22/29°C

24°C22/27°C

23°C21/27°C

25°C22/29°C

24°C21/30°C

25°C22/29°C

26°C21/33°C

26°C23/32°C

27°C23/31°C

25°C22/30°C

23°C22/23°C

23°C22/26°C

26°C23/29°C

24°C23/27°C

25°C22/30°C

27°C23/32°C

28°C24/33°C

29°C24/34°C

5 AM

12 PM

7 PM

12 AM

4 AM

0°C0/0°C

Day time

Avg. Highest Time

5 AM - 7 PM

46AQI

15 hours / Day

450 hours / Month

Avg. Lowest Time

5 AM - 7 PM

46AQI

15 hours / Day

450 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 7 PM (Avg. 46), while the lowest AQI was between 5 AM to 7 PM (Avg. 46).

Night time

Avg. Highest Time

12 AM - 8 PM

44AQI

6 hours / Day

180 hours / Month

Avg. Lowest Time

12 AM - 11 PM

44AQI

9 hours / Day

270 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 8 PM (Avg. 44), while the lowest AQI was between 12 AM to 11 PM (Avg. 44).

2025 Days Vs Air Quality
Ozu, Kumamoto, Japan

2025

73%

134

27%

Total number of days with different AQI categories in last 184 days in 2025 (181 days remaining)

Good

134 Days

Moderate

49 Days

Poor

0 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 73%

Health Risk Level:

Low

In 2025, 73% of 184 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
Ozu, Kumamoto, 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.

49AQI

42AQI

48AQI

47AQI

45AQI

38AQI

64AQI

No. of days

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

202545AQI

134

Highest AQI recorded in

July

64AQI

Lowest AQI recorded in

June

38AQI

202442AQI

189

Highest AQI recorded in

January

65AQI

Lowest AQI recorded in

July

28AQI

202345AQI

230

132

Highest AQI recorded in

April

52AQI

Lowest AQI recorded in

August

34AQI

202246AQI

191

114

Highest AQI recorded in

August

66AQI

Lowest AQI recorded in

September

40AQI

202144AQI

229

125

Highest AQI recorded in

January

51AQI

Lowest AQI recorded in

August

29AQI

202046AQI

153

102

Highest AQI recorded in

December

57AQI

Lowest AQI recorded in

July

28AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2022(Avg.)

46AQI

Least Polluted Year Recorded

2024(Avg.)

42AQI

Ozu's annual 2025 AQI (45) shows an average percentage change of 0.9% (worsened AQI) compared to previous years: 2020 (46), 2021 (44), 2022 (46), 2023 (45), 2024 (42).


5 AM	50
6 AM	50
7 AM	51
8 AM	51
9 AM	87
10 AM	107
11 AM	108
12 PM	103
1 PM	85
2 PM	86
3 PM	85
4 PM	83
5 PM	89
6 PM	94
7 PM	91
8 PM	82
9 PM	81
10 PM	81
11 PM	81
12 AM	81
1 AM	81
2 AM	60
3 AM	53
4 AM	53

Ozu, Kumamoto, Japan Historical Air Quality Analysis

July Air Quality AnalysisOzu, Kumamoto, Japan

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025Ozu, Kumamoto, Japan

Day & Night AQI Trend : Jun - Jul 2025Ozu, Kumamoto, Japan

2025 Days Vs Air Quality Ozu, Kumamoto, Japan

Annual Air Quality InsightsOzu, Kumamoto, Japan

AQI levels in 2025

No. of days

July Air Quality Analysis
Ozu, Kumamoto, Japan

Day & Night AQI Trend: 2nd Jul - 3rd Jul 2025
Ozu, Kumamoto, Japan

Day & Night AQI Trend : Jun - Jul 2025
Ozu, Kumamoto, Japan

2025 Days Vs Air Quality
Ozu, Kumamoto, Japan

Annual Air Quality Insights
Ozu, Kumamoto, Japan