Kolkata: Air Pollution Today — AQI Index, PM2.5/PM10, Smog Alerts and Forecast

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Latest air quality data: Kolkata

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Pollution and air quality forecast for Kolkata. Today is Thursday, August 27, 2026. The following air pollution values have been recorded for Kolkata:

particulate matter (PM2.5) dust - 35 (Unhealthy for Sensitive Groups)
particulate matter (PM10) suspended dust - 36 (Moderate)
ozone (O3) - 71 (Moderate)
nitrogen dioxide (NO2) - 14 (Good)
sulfur dioxide (SO2) - 12 (Good)
carbon monoxide (CO) - 418 (Good)

Real-time Air Quality Index (AQI) for Kolkata, Thursday, August 27, 2026: 3.

AQI 3 Unhealthy for Sensitive Groups

What is the air quality in Kolkata today? Is the air polluted in Kolkata?. Is there smog?

Today (Thursday, August 27, 2026) air quality is moderately polluted in Kolkata. Healthy people may experience slight irritations and sensitive persons will be slightly affected to a larger extent by the pollutions in Kolkata.

What is the current level of PM2.5 in Kolkata? (particulate matter (PM2.5) dust)
Today's PM2.5 level is: 35 (Unhealthy for Sensitive Groups) For comparison, the highest level of PM2.5 in Kolkata in the last 7 days was: 33 (Friday, August 21, 2026) and the lowest: 10 (Monday, August 24, 2026). The highest PM2.5 values were recorded: 209 (January 2018). The lowest level of particulate matter PM2.5 pollution occurs in month: August (15).

What is the level of PM10 today in Kolkata? (particulate matter (PM10) suspended dust)
The current level of particulate matter PM10 in Kolkata is: 36 (Moderate) The highest PM10 values usually occur in month: 184 (January 2017). The lowest value of particulate matter PM10 pollution in Kolkata is usually recorded in: June (16).

How is the O3 level today in Kolkata? (ozone (O3))
71 (Moderate)

How high is the level of NO2? (nitrogen dioxide (NO2))
14 (Good)

What is the level of SO2 pollution? (sulfur dioxide (SO2))
12 (Good)

How high is the CO level? (carbon monoxide (CO))
418 (Good)

Current data Thursday, August 27, 2026 at 6:30 AM

PM2,5 35 (Unhealthy for Sensitive Groups)

PM10 36 (Moderate)

O3 71 (Moderate)

NO2 14 (Good)

SO2 12 (Good)

CO 418 (Good)

Data on air pollution from recent days in Kolkata

index	2026-08-27	2026-08-26	2026-08-25	2026-08-24	2026-08-23	2026-08-22	2026-08-21	2026-08-20
pm25	31 Moderate	22 Moderate	11 Good	10 Good	12 Good	28 Moderate	33 Moderate	22 Moderate
pm10	33 Moderate	24 Moderate	13 Good	11 Good	13 Good	31 Moderate	37 Moderate	26 Moderate
o3	98 Moderate	92 Moderate	77 Moderate	84 Moderate	75 Moderate	84 Moderate	103 Moderate	88 Moderate
no2	11 Good	9 Good	6 Good	6 Good	9 Good	11 Good	11 Good	8 Good
so2	13 Good	9 Good	6 Good	6 Good	9 Good	12 Good	14 Good	9 Good
co	450 Good	453 Good	274 Good	300 Good	332 Good	487 Good	466 Good	394 Good

data source »

pollution pm25 hikersbay.com — Air pollution in Kolkata from December 2015 to May 2020

index	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10	2018-09	2018-08	2018-07	2018-06	2018-05	2018-04	2018-03	2018-02	2018-01	2017-12	2017-11	2017-10	2017-09	2017-08	2017-07	2017-06	2017-05	2017-04	2017-03	2017-02	2017-01	2016-12	2016-11	2016-10	2016-09	2016-08	2016-07	2016-06	2016-05	2016-04	2016-03	2016-02	2016-01	2015-12
pm25	20 (Moderate)	28 (Moderate)	61 (Unhealthy)	120 (Very bad Hazardous)	141 (Very bad Hazardous)	148 (Very bad Hazardous)	128 (Very bad Hazardous)	54 (Unhealthy for Sensitive Groups)	19 (Moderate)	15 (Moderate)	19 (Moderate)	22 (Moderate)	36 (Unhealthy for Sensitive Groups)	33 (Moderate)	62 (Unhealthy)	94 (Very Unhealthy)	187 (Very bad Hazardous)	174 (Very bad Hazardous)	125 (Very bad Hazardous)	79 (Very Unhealthy)	62 (Unhealthy)	33 (Moderate)	30 (Moderate)	40 (Unhealthy for Sensitive Groups)	32 (Moderate)	43 (Unhealthy for Sensitive Groups)	82 (Very Unhealthy)	104 (Very Unhealthy)	209 (Very bad Hazardous)	162 (Very bad Hazardous)	101 (Very Unhealthy)	48 (Unhealthy for Sensitive Groups)	40 (Unhealthy for Sensitive Groups)	32 (Moderate)	36 (Unhealthy for Sensitive Groups)	33 (Moderate)	40 (Unhealthy for Sensitive Groups)	45 (Unhealthy for Sensitive Groups)	60 (Unhealthy)	121 (Very bad Hazardous)	151 (Very bad Hazardous)	185 (Very bad Hazardous)	162 (Very bad Hazardous)	68 (Unhealthy)	21 (Moderate)	36 (Unhealthy for Sensitive Groups)	33 (Moderate)	29 (Moderate)	35 (Unhealthy for Sensitive Groups)	41 (Unhealthy for Sensitive Groups)	73 (Unhealthy)	100 (Very Unhealthy)	161 (Very bad Hazardous)	162 (Very bad Hazardous)
no2	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	45 (Moderate)	- (Good)	- (Good)	46 (Moderate)	39 (Good)	37 (Good)	20 (Good)	26 (Good)	66 (Moderate)	104 (Unhealthy for Sensitive Groups)	103 (Unhealthy for Sensitive Groups)	42 (Moderate)	36 (Good)	22 (Good)	26 (Good)	22 (Good)	21 (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)
so2	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	5.8 (Good)	- (Good)	- (Good)	11 (Good)	11 (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)
co	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	1 (Good)	- (Good)	- (Good)	638 (Good)	775 (Good)	1 (Good)	758 (Good)	899 (Good)	1 (Good)	2 (Good)	1 (Good)	2 (Good)	1 (Good)	506 (Good)	524 (Good)	559 (Good)	553 (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)
o3	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	24 (Good)	- (Good)	- (Good)	19 (Good)	87 (Moderate)	50 (Good)	39 (Good)	26 (Good)	22 (Good)	13 (Good)	14 (Good)	15 (Good)	16 (Good)	12 (Good)	14 (Good)	17 (Good)	17 (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)
pm10	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	96 (Unhealthy)	- (Good)	- (Good)	30 (Moderate)	54 (Unhealthy for Sensitive Groups)	51 (Unhealthy for Sensitive Groups)	59 (Unhealthy for Sensitive Groups)	66 (Unhealthy for Sensitive Groups)	139 (Very Unhealthy)	184 (Very bad Hazardous)	158 (Very bad Hazardous)	143 (Very Unhealthy)	76 (Unhealthy for Sensitive Groups)	24 (Moderate)	29 (Moderate)	24 (Moderate)	16 (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)	- (Good)

data source »

Quality of life in Kolkata

Green and Parks in the City

Kolkata 47%

Nepal: 32% Bangladesh: 33% Bhutan: 82% Sri Lanka: 59% Pakistan: 49%

particulate matter PM2.5

Kolkata 74 (Unhealthy)

Pleasure of spending time in the city

Kolkata 35%

Nepal: 32% Bangladesh: 26% Bhutan: 61% Sri Lanka: 52% Pakistan: 43%

particulate matter PM10

Kolkata 140 (Very Unhealthy)

Air Pollution

Kolkata 74%

Nepal: 76% Bangladesh: 78% Bhutan: 45% Sri Lanka: 53% Pakistan: 64%

Garbage Disposal

Kolkata 32%

Nepal: 25% Bangladesh: 22% Bhutan: 47% Sri Lanka: 41% Pakistan: 34%

Availability and quality of drinking water

Kolkata 48%

Nepal: 36% Bangladesh: 44% Bhutan: 64% Sri Lanka: 65% Pakistan: 44%

Cleanliness and tidiness

Kolkata 33%

Nepal: 27% Bangladesh: 23% Bhutan: 57% Sri Lanka: 52% Pakistan: 40%

Noise and Light pollution

Kolkata 65%

Nepal: 55% Bangladesh: 63% Bhutan: 55% Sri Lanka: 50% Pakistan: 59%

Water Pollution

Kolkata 69%

Nepal: 76% Bangladesh: 74% Bhutan: 56% Sri Lanka: 57% Pakistan: 70%

Source: Numbeo

Kolkata

Thursday, August 27, 2026 at 6:30 AM

PM2,5 35 (Moderate)

particulate matter (PM2.5) dust

PM10 36 (Moderate)

particulate matter (PM10) suspended dust

O3 71 (Moderate)

ozone (O3)

NO2 14 (Good)

nitrogen dioxide (NO2)

SO2 12 (Good)

sulfur dioxide (SO2)

CO 418 (Good)

carbon monoxide (CO)

Kolkata

index	2026-08-20	2026-08-21	2026-08-22	2026-08-23	2026-08-24	2026-08-25	2026-08-26	2026-08-27
pm25	22	33	28	12	10	11	22	31
pm10	26	37	31	13	11	13	24	33
o3	88	103	84	75	84	77	92	98
no2	8.4	11	11	8.8	5.6	6.1	9	11
so2	9.5	14	12	8.8	6.4	5.8	9.2	13
co	394	466	487	332	300	274	453	450

US Diplomatic Post: Kolkata

index	2020-05	2020-04	2020-03	2020-02	2020-01	2019-12	2019-11	2019-10	2019-09	2019-08	2019-07	2019-06	2019-05	2019-04	2019-03	2019-02	2019-01	2018-12	2018-11	2018-10	2018-09	2018-08	2018-07	2018-06	2018-05	2018-04	2018-03	2018-02	2018-01	2017-12	2017-11	2017-10	2017-09	2017-08	2017-07	2017-06	2017-05	2017-04	2017-03	2017-02	2017-01	2016-12	2016-11	2016-10	2016-09	2016-08	2016-07	2016-06	2016-05	2016-04	2016-03	2016-02	2016-01	2015-12
pm25	20	28	61	120	141	148	128	54	19	15	19	22	36	33	62	94	187	174	125	79	62	33	30	40	32	43	82	104	209	162	101	48	40	32	36	33	40	45	60	121	151	185	162	68	21	36	33	29	35	41	73	100	161	162

Victoria Memorial - WBSPCB

index	2017-10	2017-07	2017-06	2017-05	2017-04	2017-03	2017-02	2017-01	2016-12	2016-11	2016-10	2016-09	2016-08	2016-07	2016-06
co	1	638	775	1	758	899	1	2	1	2	1	506	524	559	553
o3	24	19	87	50	39	26	22	13	14	15	16	12	14	17	17
no2	45	46	39	37	20	26	66	104	103	42	36	22	26	22	21
pm10	96	30	54	51	59	66	139	184	158	143	76	24	29	24	16
so2	5.8	11	11	-	-	-	-	-	-	-	-	-	-	-	-

* Pollution data source: https://openaq.org (StateAir_Kolkata, CPCB) The data is licensed under CC-By 4.0

🌦️ Weather · 16-day Forecast — India

16-day weather forecast for India: today around 28°C (rain), lows near 24°C. Daily temperature and conditions, updated every day. Strong wind (about 23 km/h) is actively clearing smog and dust away.

☀️ UV Index · 16-day Forecast — India

The UV index in India today is 6.7 (high) — unprotected fair skin can burn in about 30 minutes.

📍 Air quality in nearby cities

Live PM2.5 around Kolkata — compare nearby locations.

JessoreBangladesh 20 µg/m³
KhulnaBangladesh 17 µg/m³
RajshahiBangladesh 26 µg/m³
BarisālBangladesh 10 µg/m³
NāgarpurBangladesh 16 µg/m³
DhakaBangladesh 12 µg/m³
TongiBangladesh 13 µg/m³
Mumbai 13 µg/m³

Frequently asked questions

Is the air safe to breathe in Kolkata today?

The current average PM2.5 across Kolkata is about 35 µg/m³, rated “Moderate”. Air quality is acceptable, but unusually sensitive people should limit prolonged outdoor exertion.

What is the current PM2.5 level in Kolkata?

Right now PM2.5 in Kolkata averages about 35 µg/m³ (“Moderate”). PM2.5 are fine particles small enough to reach the lungs and bloodstream.

Which day last week had the worst air in Kolkata?

Over the past week, the highest daily PM2.5 in Kolkata was recorded on Friday, August 21 (about 33 µg/m³).

What is the UV index in Kolkata today?

The UV index in Kolkata today is 6.7 (high) — unprotected fair skin can burn in about 30 minutes.

Does today's wind help disperse smog in Kolkata?

Strong wind (about 23 km/h) is actively clearing smog and dust away.

How is air quality measured?

Air quality here is based on PM2.5 — the concentration of fine particulate matter in µg/m³. Lower values mean cleaner air. Data is updated daily from Open-Meteo.