Sofia, Sofia Grad, Bulgaria 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
Sofia, Sofia Grad, Bulgaria

2021

2022

2023

2024

2025

AQI

Days

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

AQI Trends: Highest and Lowest

Highest AQI recorded on

30th Jul 2021

47AQI

Lowest AQI recorded on

29th Jul 2023

17AQI

Same Day Analysis (2nd July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 44 of Good air quality on the same day.

Day & Night AQI Trend: 3rd Jul - 4th Jul 2025
Sofia, Sofia Grad, Bulgaria

AQI

Day

Night

5 AM3rd Jul 2025

9 PM

4 AM4th Jul 2025

Day time

Avg. Highest Time

12AMNaNth undefined

AQI

Avg. Lowest Time

12AMNaNth undefined

AQI

Night time

Avg. Highest Time

1AM4th Jul

47AQI

Avg. Lowest Time

8PM3rd Jul

41AQI

In the last 24 hours,

Sofia's AQI reached its highest point of 47 at 1 AM during the Night, while the lowest point, undefined, was recorded at 4 AM during the Night between 3rd Jul and 4th Jul 2025.

Day & Night AQI Trend : Jun - Jul 2025
Sofia, Sofia Grad, Bulgaria

JunJul

04th - 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 - 04th04th

Day

Night

21°C14/28°C

20°C15/27°C

19°C13/28°C

20°C13/28°C

22°C14/30°C

20°C15/24°C

18°C12/25°C

19°C11/26°C

19°C13/24°C

18°C10/25°C

17°C10/24°C

19°C10/26°C

20°C12/28°C

21°C13/28°C

21°C14/28°C

21°C13/27°C

16°C10/22°C

18°C9/25°C

19°C10/27°C

22°C13/31°C

24°C15/32°C

25°C16/34°C

24°C17/35°C

21°C16/27°C

21°C14/28°C

22°C14/29°C

23°C16/30°C

22°C14/29°C

0°C0/0°C

5 AM

1 PM

9 PM

1 AM

4 AM

0°C0/0°C

Day time

Avg. Highest Time

5 AM - 9 PM

50AQI

17 hours / Day

510 hours / Month

Avg. Lowest Time

5 AM - 9 PM

50AQI

17 hours / Day

510 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 5 AM to 9 PM (Avg. 50), while the lowest AQI was between 5 AM to 9 PM (Avg. 50).

Night time

Avg. Highest Time

12 AM - 11 PM

51AQI

7 hours / Day

210 hours / Month

Avg. Lowest Time

12 AM - 11 PM

51AQI

7 hours / Day

210 hours / Month

In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 51), while the lowest AQI was between 12 AM to 11 PM (Avg. 51).

2025 Days Vs Air Quality
Sofia, Sofia Grad, Bulgaria

2025

42%

58%

106

0.5%

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

Good

76 Days

Moderate

106 Days

Poor

1 Days

Unhealthy

0 Days

Severe

0 Days

Hazardous

0 Days

Under WHO’s Safe Air Quality Limits: 42%

Health Risk Level:

Significant

In 2025, 42% of 184 days were within WHO’s safe air quality limits, and 58% exceeded them. The risk of health issues is Significant, especially for those with existing respiratory or heart conditions.

Annual Air Quality Insights
Sofia, Sofia Grad, Bulgaria

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.

78AQI

65AQI

55AQI

43AQI

40AQI

50AQI

45AQI

No. of days

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

202555AQI

106

Highest AQI recorded in

January

78AQI

Lowest AQI recorded in

May

40AQI

202435AQI

288

Highest AQI recorded in

November

77AQI

Lowest AQI recorded in

May

20AQI

202325AQI

325

Highest AQI recorded in

December

29AQI

Lowest AQI recorded in

April

20AQI

202228AQI

310

Highest AQI recorded in

December

34AQI

Lowest AQI recorded in

September

23AQI

202129AQI

346

Highest AQI recorded in

August

38AQI

Lowest AQI recorded in

December

23AQI

202024AQI

251

Highest AQI recorded in

November

34AQI

Lowest AQI recorded in

June

17AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded

2025(Avg.)

55AQI

Least Polluted Year Recorded

2020(Avg.)

24AQI

Sofia's annual 2025 AQI (55) shows an average percentage change of 97.3% (worsened AQI) compared to previous years: 2020 (24), 2021 (29), 2022 (28), 2023 (25), 2024 (35).


5 AM	45
6 AM	45
7 AM	45
8 AM	45
9 AM	45
10 AM	45
11 AM	45
12 PM	42
1 PM	42
2 PM	41
3 PM	42
4 PM	42
5 PM	42
6 PM	42
7 PM	41
8 PM	41
9 PM	43
10 PM	43
11 PM	45
12 AM	44
1 AM	47
2 AM	46
3 AM
4 AM

Sofia, Sofia Grad, Bulgaria Historical Air Quality Analysis

July Air Quality AnalysisSofia, Sofia Grad, Bulgaria

Day & Night AQI Trend: 3rd Jul - 4th Jul 2025Sofia, Sofia Grad, Bulgaria

Day & Night AQI Trend : Jun - Jul 2025Sofia, Sofia Grad, Bulgaria

2025 Days Vs Air Quality Sofia, Sofia Grad, Bulgaria

Annual Air Quality InsightsSofia, Sofia Grad, Bulgaria

AQI levels in 2025

No. of days

July Air Quality Analysis
Sofia, Sofia Grad, Bulgaria

Day & Night AQI Trend: 3rd Jul - 4th Jul 2025
Sofia, Sofia Grad, Bulgaria

Day & Night AQI Trend : Jun - Jul 2025
Sofia, Sofia Grad, Bulgaria

2025 Days Vs Air Quality
Sofia, Sofia Grad, Bulgaria

Annual Air Quality Insights
Sofia, Sofia Grad, Bulgaria