SmogRank / World / Japan / Ibaraki / April 2024

Most polluted cities in Ibaraki, Japan, April 2024

17 cities in Ibaraki, Japan ranked by their average PM2.5 over the 30 days. Worst: Chikusei at 12.2 µg/m³, #674 of 2,482 cities in the world. Cleanest: Koga at 8.4. 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.

← Hitachi 3% 3%0

Every city in Ibaraki, Japan ranked for April 2024, 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.

1Hitachi
3%
2Chikusei
0%
3Bandō
0%
4Naka
0%
4Tsuchiura
0%
6Shimo-tsuma
0%
7Ishioka
0%
8Hitachiomiya
0%
9Jōsō
0%
10Kamisu
0%
11Toride
0%
12Inashiki
0%
13Kitaibaraki
0%
14Hitachi-Naka
0%
15Kashima-shi
0%
16Hokota
0%
17Koga
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, April 2024 · All cities in Japan, April 2024 · Ibaraki now

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SmogRank, most polluted cities in Ibaraki, Japan, PM2.5, April 2024, smogrank.com/jp/region/ibaraki/history/2024-04 (accessed 7 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.