SmogRank / Nepal / Lumbini Province

Air quality in Butwāl

Lumbini Province, Nepal. PM2.5 from 7 low-cost sensors, updated hourly.

47.5 µg/m³
Unhealthy for sensitive groups

Latest hour (12:00 UTC), 3.2× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#178
of 2,333 · 18.1 µg/m³
30 days
#108
of 2,331 · 25.6 µg/m³
Year
–
not enough data

Last 4 days, hour by hour

15572026-10-01 00:00 UTC: 40.8 µg/m³2026-10-01 01:00 UTC: 43.7 µg/m³2026-10-01 02:00 UTC: 56.7 µg/m³2026-10-01 03:00 UTC: 50.2 µg/m³2026-10-01 04:00 UTC: 52.5 µg/m³2026-10-01 05:00 UTC: 55.6 µg/m³2026-10-01 06:00 UTC: 53.3 µg/m³2026-10-01 07:00 UTC: 48.0 µg/m³2026-10-01 08:00 UTC: 46.6 µg/m³2026-10-01 09:00 UTC: 45.2 µg/m³2026-10-01 10:00 UTC: 44.0 µg/m³2026-10-01 12:00 UTC: 47.5 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

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data2026-04-23: no data2026-04-24: no data2026-04-25: no data2026-04-26: no data2026-04-27: no data2026-04-28: no data2026-04-29: no data2026-04-30: no data2026-05-01: no data2026-05-02: no data2026-05-03: no data2026-05-04: no data2026-05-05: no data2026-05-06: no data2026-05-07: no data2026-05-08: no data2026-05-09: no data2026-05-10: no data2026-05-11: no data2026-05-12: no data2026-05-13: no data2026-05-14: no data2026-05-15: no data2026-05-16: no data2026-05-17: no data2026-05-18: no data2026-05-19: no data2026-05-20: no data2026-05-21: no data2026-05-22: no data2026-05-23: no data2026-05-24: no data2026-05-25: no data2026-05-26: no data2026-05-27: no data2026-05-28: no data2026-05-29: no data2026-05-30: no data2026-05-31: no data2026-06-01: no data2026-06-02: no data2026-06-03: no data2026-06-04: no data2026-06-05: no data2026-06-06: no data2026-06-07: no data2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: no data2026-06-12: no data2026-06-13: no data2026-06-14: no data2026-06-15: no data2026-06-16: no data2026-06-17: no data2026-06-18: no data2026-06-19: no data2026-06-20: no data2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: 48.8 µg/m³2026-07-01: no data2026-07-02: no data2026-07-03: no data2026-07-04: 28.2 µg/m³2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: 24.8 µg/m³2026-07-13: no data2026-07-14: 25.9 µg/m³2026-07-15: 23.8 µg/m³2026-07-16: 23.2 µg/m³2026-07-17: 27.4 µg/m³2026-07-18: 22.7 µg/m³2026-07-19: 11.4 µg/m³2026-07-20: 11.2 µg/m³2026-07-21: 10.2 µg/m³2026-07-22: 10.9 µg/m³2026-07-23: 12.8 µg/m³2026-07-24: 23.4 µg/m³2026-07-25: 23.6 µg/m³2026-07-26: 19.2 µg/m³2026-07-27: 18.8 µg/m³2026-07-28: 23.2 µg/m³2026-07-29: 18.2 µg/m³2026-07-30: 14.6 µg/m³2026-07-31: 19.2 µg/m³2026-08-01: 27.1 µg/m³2026-08-02: 28.8 µg/m³2026-08-03: 27.9 µg/m³2026-08-04: 27.8 µg/m³2026-08-05: 17.9 µg/m³2026-08-06: 16.9 µg/m³2026-08-07: 20.0 µg/m³2026-08-08: 27.7 µg/m³2026-08-09: 25.4 µg/m³2026-08-10: 22.8 µg/m³2026-08-11: 12.3 µg/m³2026-08-12: 19.6 µg/m³2026-08-13: 25.4 µg/m³2026-08-14: 20.2 µg/m³2026-08-15: 23.4 µg/m³2026-08-16: 18.2 µg/m³2026-08-17: 20.8 µg/m³2026-08-18: 22.8 µg/m³2026-08-19: 20.8 µg/m³2026-08-20: 29.8 µg/m³2026-08-21: 35.8 µg/m³2026-08-22: 41.6 µg/m³2026-08-23: 36.4 µg/m³2026-08-24: 31.7 µg/m³2026-08-25: 20.1 µg/m³2026-08-26: 24.8 µg/m³2026-08-27: 22.4 µg/m³2026-08-28: 23.7 µg/m³2026-08-29: 36.7 µg/m³2026-08-30: 22.1 µg/m³2026-08-31: 15.8 µg/m³2026-09-01: 8.9 µg/m³2026-09-02: 9.3 µg/m³2026-09-03: 13.7 µg/m³2026-09-04: 22.2 µg/m³2026-09-05: 33.0 µg/m³2026-09-06: 39.4 µg/m³2026-09-07: 42.2 µg/m³2026-09-08: 34.6 µg/m³2026-09-09: 24.4 µg/m³2026-09-10: 24.7 µg/m³2026-09-11: 12.1 µg/m³2026-09-12: 17.9 µg/m³2026-09-13: 29.9 µg/m³2026-09-14: 36.5 µg/m³2026-09-15: 39.3 µg/m³2026-09-16: 42.0 µg/m³2026-09-17: 39.0 µg/m³2026-09-18: 32.7 µg/m³2026-09-19: 33.2 µg/m³2026-09-20: 34.1 µg/m³2026-09-21: 33.0 µg/m³2026-09-22: 27.7 µg/m³2026-09-23: 12.3 µg/m³2026-09-24: 3.3 µg/m³2026-09-25: 0.3 µg/m³2026-09-26: 0.8 µg/m³2026-09-27: 10.6 µg/m³2026-09-28: 23.2 µg/m³2026-09-29: 39.1 µg/m³2026-09-30: 49.7 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

66 of 82 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2385JulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15JanFebMarAprMayJunJul 2026: 19.6 µg/m³JulAug 2026: 24.7 µg/m³AugSep 2026: 25.6 µg/m³SepOctNovDec

Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

StationOperatorType
FHI-OU-09: Lumbini Provincial Hospital, BSMCCC BY 4.0FHI 360 NepalLow-cost
FHI-OU-07: BSMC Ward No. 18 OfficeCC BY 4.0FHI 360 NepalLow-cost
FHI-OU-05: Nayagaun Secondary School, BSMCCC BY 4.0FHI 360 NepalLow-cost
Kalika Manavgyan Secondary SchoolCC BY 4.0FHI 360 NepalLow-cost
FHI-OU-06: Semlar Health Post, BSMCCC BY 4.0FHI 360 NepalLow-cost
FHI-OU-01: Butwal Sub-metro City OfficeCC BY 4.0FHI 360 NepalLow-cost
FHI-OU-02: Sainamaina Municipal HospitalCC BY 4.0FHI 360 NepalLow-cost

No reference monitor here, so the value is the median of low-cost sensors (at least two reporting each hour). Low-cost sensors can read high in humid air. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Nepal

Kathmandu 20.2

30-day averages, µg/m³. All of Nepal →

Updated 2026-10-01 13:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.