SmogRank / India / Assam / Nalbāri
Nalbāri, month by month
Nalbāri has a measured daily mean on 415 days since 20 February 2025. Its worst month was December 2025, at 160 US AQI (68.0 µg/m³), 115th of 3,006 cities on that month's world ranking. Its cleanest was July 2025, at 91 US AQI (30.4 µg/m³).
Every month since 2025
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
11 months
| Month | Why |
|---|---|
| Oct 2026 | 6 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 2026 | 14 of 31 days measured; a month needs 22. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| Jul 2026 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Jun 2026 | 17 of 30 days measured; a month needs 21. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| May 2026 | 18 of 31 days measured; a month needs 22. The others: 13 with under 18 hours of readings or readings that failed our checks. |
| Feb 2026 | 14 of 28 days measured; a month needs 20. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Jan 2026 | 16 of 31 days measured; a month needs 22. The others: 15 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. |
| Apr 2025 | 16 of 30 days measured; a month needs 21. The others: 14 with under 18 hours of readings or readings that failed our checks. |
| Mar 2025 | 13 of 31 days measured; a month needs 22. The others: 18 with under 18 hours of readings or readings that failed our checks. |
| Feb 2025 | 6 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.
Nalbāri's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| December 2025 | 16068.0 µg/m³ | 115thof 3,006 | – |
| March 2026 | 15055.3 µg/m³ | 61stof 2,971 | – |
| November 2025 | 11842.4 µg/m³ | 202ndof 2,715 | – |
| September 2025 | 10637.5 µg/m³ | 44thof 3,104 | – |
| October 2025 | 10436.7 µg/m³ | 158thof 2,614 | India and Pakistan, October 2025 |
| August 2025 | 10135.7 µg/m³ | 56thof 2,901 | – |
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.
Nalbāri's worst days
| Day | US AQI | Episode |
|---|---|---|
| 21 Oct 2025 | 212137.0 µg/m³ | India and Pakistan, October 2025 |
| 23 Mar 2025 | 208133.0 µg/m³ | Northern India, March and April 2025 |
| 25 Mar 2025 | 208133.0 µg/m³ | Northern India, March and April 2025 |
| 21 Mar 2025 | 205130.0 µg/m³ | North-eastern India, March 2025 |
| 20 Mar 2025 | 202127.0 µg/m³ | North-eastern India, March 2025 |
| 22 Mar 2025 | 199124.0 µg/m³ | – |
| 27 Mar 2025 | 193115.0 µg/m³ | Northern India, March and April 2025 |
| 19 Mar 2025 | 191112.0 µg/m³ | – |
| 1 Dec 2025 | 18096.9 µg/m³ | – |
| 28 Mar 2025 | 17894.5 µg/m³ | Northern India, March and April 2025 |
Daily means, the highest since 20 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, Nalbāri, India, 20 Feb 2025 – 7 Oct 2026. Monitor data from CPCB via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/in/nalbari/history (accessed 12 Oct 2026).
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.
Nalbāri 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).