Breathing in Nagano is Injurious to Health.

Air pollution threatens the health of 2.0 million people across 82 districts in Nagano. The average PM2.5 level is 9.4 µg/m³—1.9× higher than the WHO guideline.

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Brought to you by Amrit Sharma

Overview

Air Pollution in Nagano

Nagano faces significant air pollution challenges. 100% of districts exceed the WHO guideline for clean air. This is putting 2.0 million across 82 districts at risk.

The average PM2.5 over 2023 was 9.4µg/m³. That's 1.9 times the WHO guideline for clean air of 5µg/m³.

This is equivalent of everybody, including children, smoking about 156 cigarettes in a year.

Trends

Air Quality Trend

Annual PM2.5 levels from 2014 to 2023. The WHO guideline for safe air is 5 µg/m³.

Health Impact

Life Expectancy Impact

If Nagano met the WHO guideline of 5 µg/m³, the average person would live 0.43 years longer.

That's 864K years of life stolen from 2.0 million people. Years of watching children grow up. Years of building a career. Years of quiet mornings and celebrations.

Lives cut short. Breathing kills.

Most Polluted

Districts with Highest Pollution

The top 10 most polluted districts in Nagano. These areas face the greatest health burden from air pollution.

  • 1.Azumino
    0.6 years lost
  • 2.Hata
    0.6 years lost
  • 3.Matsumoto
    0.5 years lost
  • 4.Nagano
    0.5 years lost
  • 5.Suzaka
    0.5 years lost
  • 6.Yamagata
    0.5 years lost
  • 7.Obuse
    0.5 years lost
  • 8.Shiojiri
    0.5 years lost
  • 9.Nakano
    0.5 years lost
  • 10.Ikeda
    0.4 years lost
Exposure

Population Exposure by Pollution Level

Distribution of population across different PM2.5 pollution levels. The WHO guideline is 5 µg/m³—only populations below this threshold are breathing safe air.

< 5 µg/m³
0%
0
5-10 µg/m³
62.5%
1.3M
10-15 µg/m³
37.5%
754K
15-25 µg/m³
0%
0
25-35 µg/m³
0%
0
> 35 µg/m³
0%
0
Districts

All 82 Districts in Nagano

Complete air quality data for every district in Nagano, sorted by population.

DistrictPopulationPM2.5 µg/m³Years Lost
Nagano362K
10.2
0.5 years
Matsumoto235K
10.6
0.5 years
Ueda154K
9.4
0.4 years
Iida100K
7.7
0.3 years
Saku96K
9.2
0.4 years
Azumino94K
10.8
0.6 years
Ina69K
8.9
0.4 years
Chikuma56K
9.5
0.4 years
Okaya55K
8.7
0.4 years
Shiojiri54K
9.7
0.5 years
Chino52K
8.4
0.3 years
Suzaka44K
10.2
0.5 years
Komoro43K
9.4
0.4 years
Nakano40K
9.6
0.5 years
Suwa39K
8.8
0.4 years
Komagane32K
8.3
0.3 years
Tōmi27K
9.5
0.4 years
Ōmachi26K
8.6
0.4 years
Minowa25K
8.8
0.4 years
Shimosuwa24K
8.7
0.4 years
Iiyama20K
9.2
0.4 years
Tatsuno19K
8.4
0.3 years
Karuizawa19K
7.9
0.3 years
Miyota16K
8.7
0.4 years
Sakaki16K
9.2
0.4 years
Obuse15K
10.0
0.5 years
Fujimi14K
8.0
0.3 years
Hata13K
10.6
0.6 years
Kitaazumi13K
9.5
0.4 years
Matsukawa12K
8.0
0.3 years
Minamiminowa12K
9.3
0.4 years
Kiso11K
7.0
0.2 years
Yamanouchi11K
8.8
0.4 years
Takamori10K
8.0
0.3 years
Iizuna10K
9.1
0.4 years
Iijima9K
7.9
0.3 years
Hakuba8K
8.0
0.3 years
Sakuho8K
8.0
0.3 years
Shinano7K
8.4
0.3 years
Miyada7K
8.4
0.3 years
Ikeda6K
9.6
0.4 years
Takagi6K
7.8
0.3 years
Takayama6K
9.4
0.4 years
Achi6K
6.8
0.2 years
Hara6K
8.1
0.3 years
Nagawa6K
8.1
0.3 years
Yamagata5K
10.2
0.5 years
Nagiso5K
7.5
0.2 years
Tateshina5K
9.1
0.4 years
Asahi5K
9.6
0.4 years
Koumi5K
7.8
0.3 years
Kijimadaira4K
9.2
0.4 years
Nakagawa4K
7.8
0.3 years
Toyooka4K
7.8
0.3 years
Anan4K
6.5
0.1 years
Kawakami4K
7.5
0.2 years
Chikuhoku4K
8.7
0.4 years
Shinshūshin4K
8.5
0.3 years
Agematsu4K
7.0
0.2 years
Shimojō4K
6.9
0.2 years
Ōkuwa3K
7.1
0.2 years
Minamimak3K
7.8
0.3 years
Nozawaonsen3K
8.4
0.3 years
Aoki3K
8.9
0.4 years
Otari3K
8.1
0.3 years
Kiso Village3K
7.0
0.2 years
Omi3K
8.7
0.4 years
Nakajō2K
8.2
0.3 years
Ogawa2K
7.8
0.3 years
Sakae2K
8.4
0.3 years
Yasuoka1K
6.5
0.1 years
Tenryū1K
6.3
0.1 years
Ikusaka1K
8.8
0.4 years
Ōshika1K
6.5
0.1 years
Kitaaiki844
7.6
0.3 years
Neba795
6.4
0.1 years
Minamiaiki760
7.5
0.2 years
Ōtaki736
7.0
0.2 years
Urugi631
6.4
0.1 years
Seinaiji533
6.8
0.2 years
Hiraya440
6.4
0.1 years
Kamiina2
7.8
0.3 years

Showing 82 districts, sorted by population (largest first). PM2.5 values are for 2023. Years lost calculated against WHO guideline of 5 µg/m³.