SmogRank / Nepal / Lumbini Province / Butwāl

Butwāl, month by month

Butwāl has a measured daily mean on 94 days since 30 June 2026. Its worst month was September 2026, at 82 US AQI (25.6 µg/m³), 171st of 2,981 cities on that month's world ranking. Its cleanest was August 2026, at 80 US AQI (24.7 µg/m³).

Every month since 2026

2026too few days for a mean (a year needs 200)94 days measured

JanFebMarAprMayJun1 dayJul20 daysAug80#168 Sep82#171 Oct117#19

Each square is a month's mean PM2.5 in US AQI from Butwāl'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 Butwāl marked; each year, the year's. A dashed square is the running month, so far.

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

2 months

Month	Why
Jul 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.
Jun 2026	1 of 30 days measured; a month needs 21.

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

Butwāl's worst months

Month	US AQI	Days measured	World rank
September 2026	8225.6 µg/m³	30 of 30	171stof 2,981
August 2026	8024.7 µg/m³	31 of 31	168thof 2,896

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.

Butwāl's worst days

Day	US AQI
3 Oct 2026	15662.3 µg/m³
4 Oct 2026	15358.3 µg/m³
2 Oct 2026	15155.5 µg/m³
30 Sept 2026	13649.7 µg/m³
30 Jun 2026	13448.8 µg/m³
7 Oct 2026	13248.2 µg/m³
1 Oct 2026	13047.2 µg/m³
7 Sept 2026	11742.2 µg/m³
5 Oct 2026	11742.1 µg/m³
16 Sept 2026	11742.0 µg/m³

Daily means, the highest since 30 Jun 2026; 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, Butwāl, Nepal, 30 Jun 2026 – 12 Oct 2026. Monitor data from AirGradient via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/np/butwal/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.

Butwāl 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).