SmogRank / India / Bihar

Air quality in Begusarai

Bihar, India. PM2.5 from 1 reference monitor, updated hourly. None of them reported in the last 24 hours.

35.7µg/m³
Unhealthy for sensitive groups

Mean for 29 Sept, the most recent day with readings, 2.4× the WHO 24-hour guideline. No hourly readings have reached us since; some networks publish days late.

Rank, worst first

24 hours–not enough data
7 days–not enough data
30 days#82of 2,313, at 29.9 µg/m³
This year#59of 2,176, at 38.6 µg/m³

Why it ranks here

Chronic pollution. Its typical day over the past year was 41.6 µg/m³, 2.8× the WHO 24-hour guideline, so it ranks high most of the time, not only during events.
Seasonal. Over the past year its worst months were January, December, averaging up to 68.0 µg/m³ against 24.0 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Begusarai's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 62.4 µg/m³2025-11-02: 55.2 µg/m³2025-11-03: no data2025-11-04: no data2025-11-05: 83.0 µg/m³2025-11-06: 58.0 µg/m³2025-11-07: no data2025-11-08: 58.0 µg/m³2025-11-09: 43.3 µg/m³2025-11-10: no data2025-11-11: 57.8 µg/m³2025-11-12: 58.5 µg/m³2025-11-13: 54.2 µg/m³2025-11-14: 42.8 µg/m³2025-11-15: 44.5 µg/m³2025-11-16: 56.7 µg/m³2025-11-17: 52.2 µg/m³2025-11-18: 45.6 µg/m³2025-11-19: 25.6 µg/m³2025-11-20: 50.8 µg/m³2025-11-21: 48.1 µg/m³2025-11-22: no data2025-11-23: 49.7 µg/m³2025-11-24: 39.6 µg/m³2025-11-25: 26.7 µg/m³2025-11-26: 29.0 µg/m³2025-11-27: 28.3 µg/m³2025-11-28: 41.1 µg/m³2025-11-29: 46.5 µg/m³2025-11-30: 40.6 µg/m³2025-12-01: 41.7 µg/m³2025-12-02: 53.8 µg/m³2025-12-03: 78.0 µg/m³2025-12-04: 63.2 µg/m³2025-12-05: 55.4 µg/m³2025-12-06: 54.5 µg/m³2025-12-07: 12.8 µg/m³2025-12-08: 29.7 µg/m³2025-12-09: 78.6 µg/m³2025-12-10: no data2025-12-11: no data2025-12-12: 74.5 µg/m³2025-12-13: 66.1 µg/m³2025-12-14: 44.4 µg/m³2025-12-15: 66.1 µg/m³2025-12-16: 70.8 µg/m³2025-12-17: 76.8 µg/m³2025-12-18: 76.3 µg/m³2025-12-19: 71.7 µg/m³2025-12-20: 71.4 µg/m³2025-12-21: 67.1 µg/m³2025-12-22: 74.0 µg/m³2025-12-23: 70.5 µg/m³2025-12-24: 74.2 µg/m³2025-12-25: 75.8 µg/m³2025-12-26: 84.6 µg/m³2025-12-27: no data2025-12-28: no data2025-12-29: 63.4 µg/m³2025-12-30: 71.8 µg/m³2025-12-31: 77.1 µg/m³2026-01-01: 81.0 µg/m³2026-01-02: 78.0 µg/m³2026-01-03: 71.2 µg/m³2026-01-04: 69.0 µg/m³2026-01-05: 78.1 µg/m³2026-01-06: 96.2 µg/m³2026-01-07: 102.0 µg/m³2026-01-08: 79.7 µg/m³2026-01-09: 74.5 µg/m³2026-01-10: 106.0 µg/m³2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: no data2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: 42.8 µg/m³2026-01-22: 19.2 µg/m³2026-01-23: no data2026-01-24: 58.1 µg/m³2026-01-25: 54.9 µg/m³2026-01-26: no data2026-01-27: no data2026-01-28: 53.5 µg/m³2026-01-29: 36.3 µg/m³2026-01-30: 57.0 µg/m³2026-01-31: 67.2 µg/m³2026-02-01: 75.8 µg/m³2026-02-02: 43.1 µg/m³2026-02-03: no data2026-02-04: no data2026-02-05: 35.3 µg/m³2026-02-06: 67.1 µg/m³2026-02-07: 62.4 µg/m³2026-02-08: no data2026-02-09: 76.5 µg/m³2026-02-10: 63.8 µg/m³2026-02-11: 63.7 µg/m³2026-02-12: 59.3 µg/m³2026-02-13: 49.1 µg/m³2026-02-14: 41.6 µg/m³2026-02-15: 48.6 µg/m³2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: 59.7 µg/m³2026-02-21: 41.9 µg/m³2026-02-22: 43.5 µg/m³2026-02-23: 48.3 µg/m³2026-02-24: 51.6 µg/m³2026-02-25: 52.9 µg/m³2026-02-26: 47.5 µg/m³2026-02-27: 49.9 µg/m³2026-02-28: 42.9 µg/m³2026-03-01: 48.1 µg/m³2026-03-02: 45.2 µg/m³2026-03-03: 68.0 µg/m³2026-03-04: 65.6 µg/m³2026-03-05: 59.1 µg/m³2026-03-06: 85.5 µg/m³2026-03-07: 74.2 µg/m³2026-03-08: 55.5 µg/m³2026-03-09: 49.9 µg/m³2026-03-10: no data2026-03-11: 64.8 µg/m³2026-03-12: 49.5 µg/m³2026-03-13: 38.7 µg/m³2026-03-14: 40.2 µg/m³2026-03-15: 37.9 µg/m³2026-03-16: 36.3 µg/m³2026-03-17: 41.3 µg/m³2026-03-18: 43.6 µg/m³2026-03-19: 32.5 µg/m³2026-03-20: 39.4 µg/m³2026-03-21: 10.1 µg/m³2026-03-22: 36.8 µg/m³2026-03-23: 45.5 µg/m³2026-03-24: 48.3 µg/m³2026-03-25: 48.9 µg/m³2026-03-26: 50.4 µg/m³2026-03-27: 54.2 µg/m³2026-03-28: no data2026-03-29: 22.2 µg/m³2026-03-30: 30.7 µg/m³2026-03-31: 37.9 µg/m³2026-04-01: 41.2 µg/m³2026-04-02: 49.3 µg/m³2026-04-03: 25.9 µg/m³2026-04-04: 20.2 µg/m³2026-04-05: 17.3 µg/m³2026-04-06: 21.9 µg/m³2026-04-07: 28.8 µg/m³2026-04-08: 22.0 µg/m³2026-04-09: 32.7 µg/m³2026-04-10: 41.6 µg/m³2026-04-11: 47.7 µg/m³2026-04-12: 56.3 µg/m³2026-04-13: 58.3 µg/m³2026-04-14: 48.0 µg/m³2026-04-15: 37.3 µg/m³2026-04-16: no data2026-04-17: 25.7 µg/m³2026-04-18: 28.0 µg/m³2026-04-19: 15.6 µg/m³2026-04-20: 44.8 µg/m³2026-04-21: 54.0 µg/m³2026-04-22: 49.3 µg/m³2026-04-23: 51.1 µg/m³2026-04-24: 42.9 µg/m³2026-04-25: 46.8 µg/m³2026-04-26: no data2026-04-27: 16.5 µg/m³2026-04-28: 21.1 µg/m³2026-04-29: 16.1 µg/m³2026-04-30: 21.0 µg/m³2026-05-01: 41.7 µg/m³2026-05-02: 12.6 µg/m³2026-05-03: 35.5 µg/m³2026-05-04: no data2026-05-05: no data2026-05-06: no data2026-05-07: 15.3 µg/m³2026-05-08: 41.6 µg/m³2026-05-09: 26.2 µg/m³2026-05-10: 28.3 µg/m³2026-05-11: 49.7 µg/m³2026-05-12: 45.2 µg/m³2026-05-13: 27.7 µg/m³2026-05-14: 34.8 µg/m³2026-05-15: 47.7 µg/m³2026-05-16: 67.2 µg/m³2026-05-17: 71.7 µg/m³2026-05-18: 58.6 µg/m³2026-05-19: 45.9 µg/m³2026-05-20: 67.5 µg/m³2026-05-21: 43.0 µg/m³2026-05-22: 27.8 µg/m³2026-05-23: 38.9 µg/m³2026-05-24: 30.8 µg/m³2026-05-25: 27.2 µg/m³2026-05-26: 17.9 µg/m³2026-05-27: no data2026-05-28: 22.0 µg/m³2026-05-29: no data2026-05-30: 22.4 µg/m³2026-05-31: 41.1 µg/m³2026-06-01: 50.2 µg/m³2026-06-02: 58.5 µg/m³2026-06-03: 45.7 µg/m³2026-06-04: 59.4 µg/m³2026-06-05: 34.4 µg/m³2026-06-06: 18.8 µg/m³2026-06-07: 24.2 µg/m³2026-06-08: 35.1 µg/m³2026-06-09: 26.8 µg/m³2026-06-10: 24.9 µg/m³2026-06-11: no data2026-06-12: 18.9 µg/m³2026-06-13: 37.5 µg/m³2026-06-14: no data2026-06-15: no data2026-06-16: 47.8 µg/m³2026-06-17: 43.6 µg/m³2026-06-18: 40.7 µg/m³2026-06-19: 33.9 µg/m³2026-06-20: 48.4 µg/m³2026-06-21: 38.6 µg/m³2026-06-22: 23.3 µg/m³2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: 20.8 µg/m³2026-06-27: 30.1 µg/m³2026-06-28: 27.2 µg/m³2026-06-29: 14.8 µg/m³2026-06-30: 10.2 µg/m³2026-07-01: 18.2 µg/m³2026-07-02: no data2026-07-03: no data2026-07-04: 6.3 µg/m³2026-07-05: 5.0 µg/m³2026-07-06: 8.3 µg/m³2026-07-07: no data2026-07-08: 30.3 µg/m³2026-07-09: 26.5 µg/m³2026-07-10: 26.2 µg/m³2026-07-11: 22.7 µg/m³2026-07-12: 40.6 µg/m³2026-07-13: 26.6 µg/m³2026-07-14: 29.9 µg/m³2026-07-15: 27.8 µg/m³2026-07-16: 12.2 µg/m³2026-07-17: 18.3 µg/m³2026-07-18: 16.4 µg/m³2026-07-19: 63.6 µg/m³2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: 18.9 µg/m³2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: 24.5 µg/m³2026-07-30: 24.2 µg/m³2026-07-31: 33.5 µg/m³2026-08-01: no data2026-08-02: 19.4 µg/m³2026-08-03: 22.8 µg/m³2026-08-04: 16.5 µg/m³2026-08-05: 10.6 µg/m³2026-08-06: 13.9 µg/m³2026-08-07: no data2026-08-08: 18.4 µg/m³2026-08-09: 18.4 µg/m³2026-08-10: 21.6 µg/m³2026-08-11: 35.9 µg/m³2026-08-12: no data2026-08-13: 25.0 µg/m³2026-08-14: 26.9 µg/m³2026-08-15: 23.7 µg/m³2026-08-16: 26.5 µg/m³2026-08-17: no data2026-08-18: 10.6 µg/m³2026-08-19: 23.1 µg/m³2026-08-20: 38.6 µg/m³2026-08-21: 46.4 µg/m³2026-08-22: 54.1 µg/m³2026-08-23: 32.9 µg/m³2026-08-24: 20.7 µg/m³2026-08-25: 17.4 µg/m³2026-08-26: 23.3 µg/m³2026-08-27: no data2026-08-28: no data2026-08-29: no data2026-08-30: 22.0 µg/m³2026-08-31: 19.9 µg/m³2026-09-01: 10.4 µg/m³2026-09-02: 14.0 µg/m³2026-09-03: 16.7 µg/m³2026-09-04: 42.3 µg/m³2026-09-05: 45.7 µg/m³2026-09-06: 33.6 µg/m³2026-09-07: 39.4 µg/m³2026-09-08: 38.2 µg/m³2026-09-09: no data2026-09-10: 31.6 µg/m³2026-09-11: 12.4 µg/m³2026-09-12: 19.5 µg/m³2026-09-13: 38.5 µg/m³2026-09-14: 41.9 µg/m³2026-09-15: no data2026-09-16: 32.3 µg/m³2026-09-17: 27.3 µg/m³2026-09-18: 30.1 µg/m³2026-09-19: 54.0 µg/m³2026-09-20: 38.2 µg/m³2026-09-21: 23.5 µg/m³2026-09-22: 23.2 µg/m³2026-09-23: 10.8 µg/m³2026-09-24: no data2026-09-25: no data2026-09-26: 11.4 µg/m³2026-09-27: 25.9 µg/m³2026-09-28: 32.1 µg/m³2026-09-29: 35.7 µg/m³2026-09-30: no data2026-10-01: no data
267 of 296 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Its world rank, day by day

#1#1712NovDecJanFebMarAprMayJunJulAugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2026: 68.0 µg/m³JanFeb 2025: 67.4 µg/m³Feb 2026: 53.5 µg/m³FebMar 2025: 59.1 µg/m³Mar 2026: 46.9 µg/m³MarApr 2025: 72.9 µg/m³Apr 2026: 35.1 µg/m³AprMay 2025: 33.6 µg/m³May 2026: 38.0 µg/m³MayJun 2025: 38.1 µg/m³Jun 2026: 33.9 µg/m³JunJul 2025: 20.6 µg/m³Jul 2026: 24.0 µg/m³JulAug 2025: 23.8 µg/m³Aug 2026: 24.5 µg/m³AugSep 2025: 16.8 µg/m³Sep 2026: 29.1 µg/m³SepOct 2025: 40.9 µg/m³OctNov 2025: 47.9 µg/m³NovDec 2025: 64.6 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 26.3 µg/m³26.320252025: 11.2 µg/m³11.2
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
DRCC Anandpur, Begusarai - BSPCBGODL-IndiaBihar State Pollution Control BoardReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Use this page

SmogRank, PM2.5 daily means, Begusarai, India, 2 Oct 2025 – 1 Oct 2026, smogrank.com/in/begusarai (accessed 2 Oct 2026).

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Other cities in India

30-day averages, µg/m³. All of India.

Updated 2026-10-01 23:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.