SmogRank / Taiwan / Taiwan / Lugu

Lugu, month by month

Lugu has a measured daily mean on 423 days since 8 May 2025. Its worst month was March 2026, at 68 US AQI (18.0 µg/m³), 674th of 2,971 cities on that month's world ranking. Its cleanest was June 2025, at 24 US AQI (4.4 µg/m³).

Every month since 2025

202657 so far280 days measured713th of 2,791 in the world
Jan65#643Feb65#694Mar68#674Apr67#475May56#600Jun29#2,093Jul33#2,447Aug31#2,642Sep56#503Oct60#295
2025too few days for a mean (a year needs 256)143 days measured
JanFebMarAprMay46#1,255Jun24#2,361JulnoneAug6 daysSep48#1,015Oct10 daysNov12 daysDec58#855
Each square is a month's mean PM2.5 in US AQI from Lugu'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 Lugu 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

4 months
MonthWhy
Nov 202512 of 30 days measured; a month needs 21. The others: 18 with under 18 hours of readings or readings that failed our checks.
Oct 202510 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks.
Aug 20256 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks.
Jul 2025No day measured. The others: 31 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.

Lugu's worst months

MonthUS AQIDays measuredWorld rank
March 2026 6818.0 µg/m³31 of 31674thof 2,971
April 2026 6717.6 µg/m³30 of 30475thof 2,941
February 2026 6516.8 µg/m³28 of 28694thof 2,866
January 2026 6516.7 µg/m³31 of 31643rdof 2,617
December 2025 5813.1 µg/m³31 of 31855thof 3,006
September 2026 5611.8 µg/m³30 of 30503rdof 2,981

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.

Lugu's worst days

DayUS AQI
18 Apr 2026 9230.9 µg/m³
15 Mar 2026 8929.4 µg/m³
28 Mar 2026 8627.8 µg/m³
21 Feb 2026 8627.7 µg/m³
20 Apr 2026 8527.5 µg/m³
14 Mar 2026 8426.8 µg/m³
22 Mar 2026 8326.4 µg/m³
5 Feb 2026 8225.8 µg/m³
23 Mar 2026 8125.4 µg/m³
20 Mar 2026 8024.9 µg/m³

Daily means, the highest since 8 May 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, Lugu, Taiwan, 8 May 2025 – 12 Oct 2026. Monitor data from Taiwan's Ministry of Environment via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/tw/lugu/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.

Lugu 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).