SmogRank / India / Bihar / Buxar

Buxar, month by month

Buxar has a measured daily mean on 380 days since 19 February 2025. Its worst month was December 2025, at 164 US AQI (73.6 µg/m³), 93rd of 3,006 cities on that month's world ranking. Its cleanest was April 2025, at 104 US AQI (36.7 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 200)148 days measured

Jan17 daysFeb124#134Mar20 daysApr19 daysMay109#111 Jun115#82Jul19 daysAug4 daysSepnoneOctnone

2025too few days for a mean (a year needs 256)232 days measured

JanFeb9 daysMar122#123 Apr104#113May21 daysJun19 daysJul14 daysAug106#43 Sep107#43Oct21 daysNov158#118 Dec164#93

Each square is a month's mean PM2.5 in US AQI from Buxar's measured days, with its place on that month's world ranking under it. A month has a mean once 70% of its days are measured, the rule the monthly rankings use; under that, the square gives the days measured. Each square opens that month's ranking with Buxar marked; each year, the year's.

Good0–50

Moderate51–100

Sensitive groups101–150

Unhealthy151–200

Very unhealthy201–300

Hazardous301+

The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales

Months without a mean, and why

12 months

Month	Why
Oct 2026	No day measured. The others: 10 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours), 1 with under 18 hours of readings or readings that failed our checks.
Sep 2026	No day measured. The others: 19 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours), 8 with under 18 hours of readings or readings that failed our checks.
Aug 2026	4 of 31 days measured; a month needs 22. The others: 27 with under 18 hours of readings or readings that failed our checks.
Jul 2026	19 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Apr 2026	19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
Mar 2026	20 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jan 2026	17 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Oct 2025	21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Jul 2025	14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Jun 2025	19 of 30 days measured; a month needs 21. The others: 11 with under 18 hours of readings or readings that failed our checks.
May 2025	21 of 31 days measured; a month needs 22. The others: 10 with under 18 hours of readings or readings that failed our checks.
Feb 2025	9 of 28 days measured; a month needs 20. The others: 1 with under 18 hours of readings or readings that failed our checks.

A day counts once 18 hours of it are measured; a month needs 70% of its days.

Buxar's worst months

Month	US AQI	Days measured	World rank	Episode
December 2025	16473.6 µg/m³	25 of 31	93rdof 3,006	–
November 2025	15865.0 µg/m³	22 of 30	118thof 2,715	–
February 2026	12445.0 µg/m³	20 of 28	134thof 2,866	–
March 2025	12243.9 µg/m³	30 of 31	123rdof 2,862	–
June 2026	11541.1 µg/m³	21 of 30	82ndof 2,497	–
May 2026	10938.7 µg/m³	28 of 31	111thof 2,874	Northern India, May 2026

Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.

Buxar's worst days

Day	US AQI	Episode
12 Aug 2026	204129.0 µg/m³	–
2 Aug 2026	201126.0 µg/m³	–
19 May 2026	198123.0 µg/m³	Northern India, May 2026
28 Apr 2026	196119.0 µg/m³	–
12 Dec 2025	189110.0 µg/m³	–
13 Dec 2025	187107.0 µg/m³	–
21 Feb 2025	185104.0 µg/m³	Bihar, India, February 2025
9 Dec 2025	184102.0 µg/m³	–
1 Jul 2026	18197.8 µg/m³	–
1 Aug 2026	18096.7 µg/m³	–

Daily means, the highest since 19 Feb 2025; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.

Use this history

SmogRank, PM2.5 monthly and daily means, Buxar, India, 19 Feb 2025 – 12 Aug 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/buxar/history (accessed 12 Oct 2026).

Download chart (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.

Buxar now: the last 24 hours, its ranks today and the last 12 months day by day.

Updated 2026-10-12 19:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).