SmogRank / World / Japan / Nagasaki / July 2026

Most polluted cities in Nagasaki, Japan, July 2026

13 cities in Nagasaki, Japan ranked by their average PM2.5 over the 31 days. Worst: Matsuura at 8.9 µg/m³, #1,614 of 2,751 cities in the world. Cleanest: Nagasaki at 6.2. A city needs measurements on 70% of the days to be ranked.

Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.

← Matsuura 0% 0.75%0
Every city in Nagasaki, Japan ranked for July 2026, one column each, ranked by unhealthy days: height is the share of its measured days that were unhealthy, colour its average. Point at it to read a city; tap to open it.
  1. 1Matsuura
    0%
  2. 2Tsushima
    0%
  3. 3Sasebo
    0%
  4. 4Togitsu
    0%
  5. 5Gotō
    0%
  6. 6Obita
    0%
  7. 6Kawatana
    0%
  8. 8Iki
    0%
  9. 8Saikai
    0%
  10. 10Ōmura
    0%
  11. 10Furukawamen
    0%
  12. 12Isahaya
    0%
  13. 13Nagasaki
    0%
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

All cities in the world, July 2026 · All cities in Japan, July 2026 · Nagasaki now

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SmogRank, most polluted cities in Nagasaki, Japan, PM2.5, July 2026, smogrank.com/jp/region/nagasaki/history/2026-07 (accessed 6 Oct 2026).

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