SmogRank / World / Japan / Chiba / October 2026

Most polluted cities in Chiba, Japan, October 2026

25 cities in Chiba, Japan ranked by their average PM2.5 so far (5 of 31 days). Worst: Kimitsu at 6.9 µg/m³, #1,149 of 2,246 cities in the world. Cleanest: Tōgane at 4.3. 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.

← Kimitsu 0% 0.75%0

Every city in Chiba, Japan ranked for October 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.

1Kimitsu
0%
2Kisarazu
0%
2Kamagaya
0%
4Kashiwa
0%
5Tateyama
0%
5Motona
0%
7Urayasu
0%
7Noda
0%
9Sakura
0%
9Inzai
0%
11Ichihara
0%
11Chiba
0%
13Yachiyo
0%
14Mobara
0%
15Narita
0%
16Matsudo
0%
16Kōzaki
0%
16Sodegaura
0%
19Narashino
0%
20Yachimata
0%
20Ōami
0%
22Sōsa
0%
23Katsuura
0%
24Omigawa
0%
25Tōgane
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, October 2026 · All cities in Japan, October 2026 · Chiba now

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SmogRank, most polluted cities in Chiba, Japan, PM2.5, October 2026 (so far), smogrank.com/jp/region/chiba/history/2026-10 (accessed 6 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.