Is the air in Patna safe today?

No, it is a health alert. Right now the US AQI in Patna is 273, which counts as very unhealthy. Health alert. Avoid outdoor activity, keep windows closed and run an air purifier if you have one.

When is the best time to be outside in Patna?

Sat 10:00–13:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 191. The worst hour is around Fri 22:00, at 273.

What is the main pollutant in Patna?

Fine particles (PM2.5). It drives the index right now, at 198 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.

How does Patna's air compare with the WHO guideline?

10.0 times the guideline. Over the next 24 hours PM2.5 averages about 149 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM10, NO2 and O3 are also forecast above their guideline levels.

How many cigarettes is a day of Patna's air?

About 6.8 cigarettes. Over the next 24 hours PM2.5 averages about 149 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.

Will air quality in Patna improve this week?

Monday looks cleanest. Its AQI peaks at 158, against 281 on Saturday, the worst day in the forecast.

Patna air quality

India · Live AQI and hourly forecast for the next 5 days · valid Fri 22:30 local time

273

Very unhealthy

US AQI, mostly PM_2.5

Model estimate. Nearby measurements are shown separately.

Health alert. Avoid outdoor activity, keep windows closed and run an air purifier if you have one.

Next 24 hours: 190–273US AQI, highest around Fri 22:00
Best time outside: Sat 10:00–13:00US AQI about 191
PM_2.5 vs WHO guideline: 10.0×149 µg/m³ over 24 h, guideline 15
Cigarette equivalent: ≈ 6.8 a dayBerkeley Earth rule of thumb

Loading the live globe…

The live globe, centred on Patna. Switch pollutants, drag through the next 5 days or press play. Full map →

Pollutants in Patna right now

Pollutant	Now	Level	Next 24 h vs WHO
Fine particles PM_2.5	198 µg/m³	Very unhealthy	10.0×
Coarse particles PM₁₀	208 µg/m³	Sensitive	3.6×
Nitrogen dioxide NO₂	70 µg/m³	Good	1.1×
Ozone O₃	17 µg/m³	Good	1.7×
Sulphur dioxide SO₂	37 µg/m³	Good	0.6×
Carbon monoxide CO	931 µg/m³	Good	0.2×
Aerosol optical depth	1.76	Whole atmosphere · dimensionless
Desert dust	18 µg/m³	Modelled surface dust
UV index	0	Low

“Next 24 h vs WHO” compares the forecast with the World Health Organization’s 2021 guideline levels: 24-hour means of 15 µg/m³ for PM_2.5, 45 for PM₁₀, 25 for NO₂, 40 for SO₂ and 4 mg/m³ for CO, and 100 µg/m³ over 8 hours for ozone. Above 1× is above the guideline. Levels follow the US AQI, which is far less strict than the WHO, so air rated Good can still be above a guideline.

Next 48 hours

Hourly US AQI. Highest 281 around Sat 23:00, lowest 156 around Sun 21:00.

50100150200300

Good 0–50Moderate 51–100Sensitive 101–150Unhealthy 151–200Very unhealthy 201–300Hazardous 301+

5-day air quality forecast for Patna

Daily range of the hourly US AQI, from lowest to highest, on a scale of 0 to 300.

Day	US AQI	At worst	Worst hour	PM_2.5 avg	UV max
Fri 13 Nov	196–273	Very unhealthy	22:00	150	2 Low
Sat 14 Nov	190–281	Very unhealthy	23:00	150	3 Moderate
Sun 15 Nov	154–281	Very unhealthy	0:00	115	4 Moderate
Mon 16 Nov	118–158	Unhealthy	7:00	55	5 Moderate
Tue 17 Nov	93–165	Unhealthy	21:00	51	6 High

Common questions about the air in Patna

Is the air in Patna safe today?
No, it is a health alert. Right now the US AQI in Patna is 273, which counts as very unhealthy. Health alert. Avoid outdoor activity, keep windows closed and run an air purifier if you have one.
When is the best time to be outside in Patna?
Sat 10:00–13:00. That is the cleanest stretch in the next 24 hours, with the US AQI averaging about 191. The worst hour is around Fri 22:00, at 273.
What is the main pollutant in Patna?
Fine particles (PM_2.5). It drives the index right now, at 198 µg/m³. Tiny particles from combustion, fires and dust that reach deep into the lungs. The main driver of AQI worldwide.
How does Patna's air compare with the WHO guideline?
10.0 times the guideline. Over the next 24 hours PM_2.5 averages about 149 µg/m³, against the World Health Organization's 24-hour guideline of 15 µg/m³. PM₁₀, NO₂ and O₃ are also forecast above their guideline levels.
How many cigarettes is a day of Patna's air?
About 6.8 cigarettes. Over the next 24 hours PM_2.5 averages about 149 µg/m³. By Berkeley Earth's rule of thumb, 22 µg/m³ breathed for a day is roughly one cigarette.
Will air quality in Patna improve this week?
Monday looks cleanest. Its AQI peaks at 158, against 281 on Saturday, the worst day in the forecast.

Measured near Patna

Station and measurements	Distance	US AQI	Level
IGSC Planetarium Complex, Patna - BSPCB OpenAQ, reference monitor PM_2.5: 81 µg/m³ · Fri 21:45 NO₂: 4.5 µg/m³ · Fri 21:45 O₃: 29 µg/m³ · Fri 21:45 SO₂: 22 µg/m³ · Fri 21:45 CO: 0.2 µg/m³ · Fri 21:45	0.0 km	169	Unhealthy
Rajbansi Nagar, Patna - BSPCB OpenAQ, reference monitor PM_2.5: 131 µg/m³ · Fri 21:45 PM₁₀: 223 µg/m³ · Fri 21:45 NO₂: 33 µg/m³ · Fri 21:45 O₃: 5.4 µg/m³ · Fri 21:45 SO₂: 34 µg/m³ · Fri 21:45 CO: 3.2 µg/m³ · Fri 21:45	2.5 km	206	Very unhealthy
Muradpur, Patna - BSPCB OpenAQ, reference monitor PM_2.5: 61 µg/m³ · Fri 21:45 PM₁₀: 261 µg/m³ · Fri 21:45 NO₂: 64 µg/m³ · Fri 21:45 O₃: 19 µg/m³ · Fri 21:45 SO₂: 24 µg/m³ · Fri 21:45 CO: 1.0 µg/m³ · Fri 21:45	3.0 km	155	Unhealthy

Air quality near Patna

US AQI right now. Cleanest nearby: Dhaka (158); worst: Lucknow (286). The tick on each bar is Patna, at 273.

Kathmandu 237 km N 204 Very unhealthy
Jhargram 397 km SE 212 Very unhealthy
Lucknow 441 km W 286 Very unhealthy
Kolkata 469 km SE 210 Very unhealthy
Kanpur 490 km W 180 Unhealthy
Dhaka 569 km E 158 Unhealthy

All 162 cities →

About this forecast

Forecast from CAMS global via Open-Meteo: the Copernicus Atmosphere Monitoring Service (CAMS) model at about 40 km resolution (about 10 km inside Europe). Global runs update every 12 hours and European runs every 24 hours. Models smooth out street-level peaks, so busy roads and industrial sites can be worse than shown. Nearby station measurements are independent observations, not adjustments to the forecast. The point forecast uses Open-Meteo’s CAMS products, including a separate carbon monoxide product; it can differ from the globe’s global grid. The AQI rates each hour on the US EPA scale, the same way the map colors it; official daily figures average over 24 hours (8 for ozone), so they can read lower after a short peak. Readings for 25.59°N, 85.14°E, valid 2026-11-13 17:00 UTC.