SmogRank / India / Bihar / Rājgīr

Rājgīr, month by month

Rājgīr has a measured daily mean on 358 days since 19 February 2025. Its worst month was December 2025, at 160 US AQI (67.7 µg/m³), 116th of 3,006 cities on that month's world ranking. Its cleanest was September 2026, at 72 US AQI (20.4 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 200)175 days measured
Jan18 daysFeb13 daysMar103#180Apr94#202May10 daysJun112#90Jul151#25AugnoneSep72#258Oct6 days
2025too few days for a mean (a year needs 256)183 days measured
JanFeb7 daysMar18 daysApr11 daysMay14 daysJun7 daysJul17 daysAug20 daysSep15 daysOct102#164Nov141#167Dec160#116
Each square is a month's mean PM2.5 in US AQI from Rājgīr'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 Rājgīr 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

13 months
MonthWhy
Oct 20266 of 12 days measured; a month needs 9. The others: 5 with no readings from the monitor, 1 with readings for part of the day (a day needs 18 hours).
Aug 2026No day measured. The others: 31 with under 18 hours of readings or readings that failed our checks.
May 202610 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Feb 202613 of 28 days measured; a month needs 20. The others: 15 with under 18 hours of readings or readings that failed our checks.
Jan 202618 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Sep 202515 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
Aug 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Jul 202517 of 31 days measured; a month needs 22. The others: 14 with under 18 hours of readings or readings that failed our checks.
Jun 20257 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks.
May 202514 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks.
Apr 202511 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks.
Mar 202518 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks.
Feb 20257 of 28 days measured; a month needs 20. The others: 3 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.

Rājgīr's worst months

MonthUS AQIDays measuredWorld rankEpisode
December 2025 16067.7 µg/m³26 of 31116thof 3,006–
July 2026 15156.1 µg/m³25 of 3125thof 2,784North-eastern India, July 2026
November 2025 14151.6 µg/m³23 of 30167thof 2,715–
June 2026 11239.8 µg/m³25 of 3090thof 2,497–
March 2026 10336.2 µg/m³29 of 31180thof 2,971–
October 2025 10235.9 µg/m³25 of 31164thof 2,614–

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.

Rājgīr's worst days

DayUS AQIEpisode
20 Feb 2025 237162.0 µg/m³Bihar, India, February 2025
11 Jul 2026 209134.0 µg/m³North-eastern India, July 2026
19 Feb 2025 206131.0 µg/m³Bihar, India, February 2025
8 Apr 2025 203128.0 µg/m³–
9 Dec 2025 202127.0 µg/m³–
24 Jul 2026 202127.0 µg/m³–
21 Feb 2025 189110.0 µg/m³Bihar, India, February 2025
19 Jul 2026 187107.0 µg/m³–
11 Dec 2025 186106.0 µg/m³–
17 Apr 2025 184103.0 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, Rājgīr, India, 19 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/rajgir/history (accessed 13 Oct 2026).

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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.

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

Updated 2026-10-13 00:07 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).