SmogRank / World / China / Liaoning / September 2023

Most unhealthy days in Liaoning, China, September 2023

We don't read China's government monitoring network: it publishes only on its own website, and we are building the reader for it. Most cities in China are missing here, not clean. The cities shown are measured by community low-cost sensors, tagged as such. Why.

1 city in Liaoning, China ranked by its share of unhealthy days over the 30 days. The most unhealthy days: Shenyang, China, 3 of 30 measured days. 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.

  1. 1Shenyang
    3 of 30
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, September 2023 · All cities in China, September 2023 · Liaoning now

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SmogRank, most polluted cities in Liaoning, China, by unhealthy days, PM2.5, September 2023, smogrank.com/cn/region/liaoning/history/2023-09?by=days (accessed 9 Oct 2026). Some readings from Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); Love My Air (City and County of Denver), no reuse terms published.

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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.