Air Quality Lab — Katsuura, Japan
Air Quality Profile·
Katsuura reports an annual PM2.5 of 9.1 µg/m³. That's close to the WHO 2021 annual guideline (5 µg/m³) and well inside historically healthy ranges.
Katsuura
Japan
JapanAnnual Average
GoodWHO annual classification
9.1µg/m³
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
PM2.5
9.49.4 µg/m³ — Good
9.29.2 µg/m³ — Good
8.58.5 µg/m³ — Good
1010 µg/m³ — Fair
7.97.9 µg/m³ — Good
8.28.2 µg/m³ — Good
8.18.1 µg/m³ — Good
8.48.4 µg/m³ — Good
9.89.8 µg/m³ — Good
1010 µg/m³ — Fair
9.09.0 µg/m³ — Good
9.49.4 µg/m³ — Good
Jan
Feb
Mar
Apr
May
Jun
9.49.4 µg/m³ — Good
9.29.2 µg/m³ — Good
8.58.5 µg/m³ — Good
1010 µg/m³ — Fair
7.97.9 µg/m³ — Good
8.28.2 µg/m³ — Good
Jul
Aug
Sep
Oct
Nov
Dec
8.18.1 µg/m³ — Good
8.48.4 µg/m³ — Good
9.89.8 µg/m³ — Good
1010 µg/m³ — Fair
9.09.0 µg/m³ — Good
9.49.4 µg/m³ — Good
Best months: May–JulWorst months: Apr, Sep–Oct
Good5–10 µg/m³Fair10–15 µg/m³
Based on WUSTL PM2.5 dataset (2020–2024) · WHO 2021 thresholds
Confidence: ●●●
How air quality compares
Compared across Japan
Katsuura: 9.1 µg/m³. Typical range in Japan: 11.7–13.4 µg/m³. Low anchor: Hamamatsu, 10.0 µg/m³. High anchor: Tokyo, 14.5 µg/m³.
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