Fungus, Niihama, Ehime, 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
Fungus, Niihama, Ehime, Japan

2021

2022

2023

2024

2025

AQI

Days

Days	2025	2024	2023	2022	2021
Sep. 1	36	33	50		59
Sep. 2	34	49	41	33	50
Sep. 3	40	64	47	35	28
Sep. 4	26	53	57	32	38
Sep. 5	20	57	45	43	45
Sep. 6	29	61	48	33	42
Sep. 7	30	63	40	41	42
Sep. 8	31	65	41	36	52
Sep. 9	33	68	41		34
Sep. 10	33	51	47	59	54
Sep. 11	30	25	42	36	58
Sep. 12	30	33	41	50	56
Sep. 13	32	49	49	38	48
Sep. 14	29	39	33	52	32
Sep. 15	37	16	46	41	24
Sep. 16	36	26	52	53	37
Sep. 17		46	45	41	29
Sep. 18		44	46	39	26
Sep. 19		42	66	25	31
Sep. 20		32	96	41	48
Sep. 21		26	59	34	47
Sep. 22		23	51	46	42
Sep. 23		26	33	42	51
Sep. 24		33	37	47	41
Sep. 25		46	40	53	35
Sep. 26		53	45	66	52
Sep. 27		55	52	47	49
Sep. 28		41	38	46	42
Sep. 29		43	58	39	48
Sep. 30		45	63	55	32

AQI Trends: Highest and Lowest

Highest AQI recorded on

20th Sep 2023

96AQI

Lowest AQI recorded on

15th Sep 2024

16AQI

Same Day Analysis (16th September ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 36 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.

Day & Night AQI Trend: 16th Sep - 17th Sep 2025
Fungus, Niihama, Ehime, Japan

AQI

Day

Night

5 AM16th Sep 2025

6 PM

4 AM17th Sep 2025

Day time

Avg. Highest Time

5PM16th Sep

56AQI

Avg. Lowest Time

9AM16th Sep

30AQI

Night time

Avg. Highest Time

7PM16th Sep

53AQI

Avg. Lowest Time

2AM17th Sep

32AQI

In the last 24 hours,

Fungus's AQI reached its highest point of 56 at 5 PM during the Day, while the lowest point, 30, was recorded at 9 AM during the Day between 16th Sep and 17th Sep 2025.

Day & Night AQI Trend : Aug - Sep 2025
Fungus, Niihama, Ehime, Japan

AugSep

18th - 19th19th - 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

Day

Night

27°C24/29°C

26°C24/29°C

26°C23/29°C

26°C24/30°C

27°C25/29°C

28°C26/30°C

27°C25/29°C

26°C24/29°C

27°C25/29°C

27°C25/30°C

27°C25/29°C

27°C25/30°C

27°C24/30°C

26°C24/29°C

25°C23/26°C

27°C24/30°C

26°C24/28°C

27°C25/31°C

28°C26/30°C

27°C25/30°C

26°C24/29°C

25°C24/27°C

25°C24/28°C

26°C23/29°C

27°C25/30°C

27°C24/29°C

5 AM

11 AM

6 PM

11 PM

4 AM

--°C/°C

Day time

Avg. Highest Time

1 PM - 6 PM

42AQI

6 hours / Day

180 hours / Month

Avg. Lowest Time

9 AM - 10 AM

35AQI

2 hours / Day

60 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 1 PM to 6 PM (Avg. 42), while the lowest AQI was between 9 AM to 10 AM (Avg. 35).

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
Fungus, Niihama, Ehime, Japan

2025

65%

169

34%

0.7%

Total number of days with different AQI categories in last 260 days in 2025 (105 days remaining)

Good

169 Days

Moderate

88 Days

Poor

2 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 65%

Health Risk Level:

Moderate

In 2025, 65% of 260 days were within WHO’s safe air quality limits, and 35% exceeded them. The risk of health issues is Moderate, particularly for individuals with respiratory or heart conditions.

Annual Air Quality Insights
Fungus, Niihama, Ehime, 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.

43AQI

44AQI

57AQI

50AQI

47AQI

52AQI

56AQI

45AQI

32AQI

No. of days

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

202548AQI

169

Highest AQI recorded in

March

57AQI

Lowest AQI recorded in

September

32AQI

202444AQI

251

112

Highest AQI recorded in

April

64AQI

Lowest AQI recorded in

December

32AQI

202348AQI

236

126

Highest AQI recorded in

June

56AQI

Lowest AQI recorded in

December

41AQI

202245AQI

229

Highest AQI recorded in

May

56AQI

Lowest AQI recorded in

December

35AQI

202144AQI

251

Highest AQI recorded in

June

57AQI

Lowest AQI recorded in

January

38AQI

202045AQI

173

Highest AQI recorded in

August

66AQI

Lowest AQI recorded in

September

32AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2025(Avg.)

48AQI

Least Polluted Year Recorded

2021(Avg.)

44AQI

Fungus's annual 2025 AQI (48) shows an average percentage change of 6.4% (worsened AQI) compared to previous years: 2020 (45), 2021 (44), 2022 (45), 2023 (48), 2024 (44).


5 AM	33
6 AM	32
7 AM	33
8 AM	33
9 AM	30
10 AM	32
11 AM	33
12 PM	38
1 PM	40
2 PM	49
3 PM	54
4 PM	55
5 PM	56
6 PM	54
7 PM	53
8 PM	47
9 PM	40
10 PM	38
11 PM	37
12 AM	39
1 AM	34
2 AM	32
3 AM	33
4 AM	33

Fungus, Niihama, Ehime, Japan Historical Air Quality Analysis

September Air Quality AnalysisFungus, Niihama, Ehime, Japan

Day & Night AQI Trend: 16th Sep - 17th Sep 2025Fungus, Niihama, Ehime, Japan

Day & Night AQI Trend : Aug - Sep 2025Fungus, Niihama, Ehime, Japan

2025 Days Vs Air Quality Fungus, Niihama, Ehime, Japan

Annual Air Quality InsightsFungus, Niihama, Ehime, Japan

AQI levels in 2025

No. of days

September Air Quality Analysis
Fungus, Niihama, Ehime, Japan

Day & Night AQI Trend: 16th Sep - 17th Sep 2025
Fungus, Niihama, Ehime, Japan

Day & Night AQI Trend : Aug - Sep 2025
Fungus, Niihama, Ehime, Japan

2025 Days Vs Air Quality
Fungus, Niihama, Ehime, Japan

Annual Air Quality Insights
Fungus, Niihama, Ehime, Japan