SmogRank / India / Bihar / Saharsa

Saharsa, month by month

Saharsa has a measured daily mean on 365 days since 19 February 2025. Its worst month was March 2026, at 155 US AQI (61.0 µg/m³), 45th of 2,971 cities on that month's world ranking. Its cleanest was August 2026, at 69 US AQI (19.0 µg/m³).

Every month since 2025

2026too few days for a mean (a year needs 200)157 days measured
Jan19 daysFeb145#91Mar155#45Apr17 daysMay20 daysJun15 daysJul5 daysAug69#264Sep12 daysOct1 day
2025too few days for a mean (a year needs 256)208 days measured
JanFeb9 daysMar127#109Apr16 daysMay19 daysJun115#71Jul20 daysAug95#73Sep7 daysOct12 daysNov122#195Dec154#154
Each square is a month's mean PM2.5 in US AQI from Saharsa'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 Saharsa 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 20261 of 12 days measured; a month needs 9. The others: 8 with no readings from the monitor, 3 with readings for part of the day (a day needs 18 hours).
Sep 202612 of 30 days measured; a month needs 21. The others: 5 with no readings from the monitor, 11 with readings for part of the day (a day needs 18 hours), 2 with readings left out by our checks.
Jul 20265 of 31 days measured; a month needs 22. The others: 26 with under 18 hours of readings or readings that failed our checks.
Jun 202615 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks.
May 202620 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
Apr 202617 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks.
Jan 202619 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Oct 202512 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks.
Sep 20257 of 30 days measured; a month needs 21. The others: 23 with under 18 hours of readings or readings that failed our checks.
Jul 202520 of 31 days measured; a month needs 22. The others: 11 with under 18 hours of readings or readings that failed our checks.
May 202519 of 31 days measured; a month needs 22. The others: 12 with under 18 hours of readings or readings that failed our checks.
Apr 202516 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks.
Feb 20259 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.

Saharsa's worst months

MonthUS AQIDays measuredWorld rankEpisode
March 2026 15561.0 µg/m³26 of 3145thof 2,971India, March 2026
December 2025 15459.2 µg/m³27 of 31154thof 3,006–
February 2026 14553.4 µg/m³20 of 2891stof 2,866–
March 2025 12746.1 µg/m³26 of 31109thof 2,862–
November 2025 12243.9 µg/m³26 of 30195thof 2,715–
June 2025 11541.2 µg/m³21 of 3071stof 2,508–

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.

Saharsa's worst days

DayUS AQIEpisode
24 Jun 2025 238163.0 µg/m³–
8 Jul 2026 214139.0 µg/m³–
24 Oct 2025 206131.0 µg/m³–
16 May 2026 203128.0 µg/m³Northern India, May 2026
21 Oct 2025 198123.0 µg/m³–
20 Oct 2025 191112.0 µg/m³–
8 Mar 2026 184102.0 µg/m³India, March 2026
11 May 2026 184102.0 µg/m³–
26 Feb 2025 18299.7 µg/m³–
23 Feb 2025 18198.4 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, Saharsa, India, 19 Feb 2025 – 3 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/saharsa/history (accessed 12 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.

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

Updated 2026-10-12 20:07 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).