Average PM2.5
28.0MEE · 2025 ↗
µg/m³ · 2025
Energy, environment and green transition · urban air
Air quality and pollution
In 2025, average PM2.5 concentration across 339 prefecture-level and above cities was 28.0 µg/m³, while 88.1% of monitored days had good air quality. The page preserves the monitoring average, pollutant statistic and dust-weather boundary.
Good-air days
88.1%
339-city average · 2025
Heavy-pollution days
0.9%
339-city average · 2025
PM2.5 vs 2021
-6.67%
30.0 to 28.0 µg/m³
Fixed scope
339 prefecture-level and above cities, 2021–2025The five-year trend uses one city set. PM2.5 and PM10 follow the source treatment of dust weather; good-air and heavy-pollution day shares retain dust-weather effects.
Not equal to
National population-weighted PM2.5 exposure
Individual exposure or health-risk probability
Pollutant emissions
2021–2025 trend
PM2.5 concentration and good-air days
Two axes show different units. Both series share the 339-city annual scope, but they cannot be added.
Source: MEE · 2021 ↗ · MEE · 2022 ↗ · MEE · 2023 ↗ · MEE · 2024 ↗ · MEE · 2025 ↗ · MEE annual 339-city monitoring averages; good-air-day shares retain dust-weather effectschinainfigures.com
2025 pollutant snapshot
Five pollutants reported in micrograms
O3 uses the daily maximum 8-hour 90th percentile. CO uses mg/m³ and the daily-mean 95th percentile, so it is kept off this numerical axis.
Source: MEE · 2025 ↗ · Annual evaluation statistics differ by pollutant; all values shown here use µg/m³chinainfigures.com
Five-year exact values
PM2.5 and good-air days
Exact 2025 values
Pollutants and air-quality days
| Metric | Statistic | Value | Unit |
|---|---|---|---|
| PM2.5 | annual mean | 28.0 | µg/m³ |
| PM10 | annual mean | 48 | µg/m³ |
| O3 | daily max 8h P90 | 138 | µg/m³ |
| SO2 | annual mean | 8 | µg/m³ |
| NO2 | annual mean | 19 | µg/m³ |
| CO | daily mean P95 | 1.0 | mg/m³ |
| Good-air days | share of monitored days | 88.1 | % |
| Heavy-pollution days | share of monitored days | 0.9 | % |
Ozone definition
138 is not an hourly annual mean
O3 uses each city’s 90th percentile of daily maximum 8-hour concentrations, then the 339-city average.
Carbon-monoxide definition
1.0 mg/m³
CO uses the daily-mean 95th percentile and mg/m³, so its bar height cannot be compared directly with microgram-based pollutants.
International boundary
No cross-country ranking
Common international PM2.5 indicators are population-weighted national exposure estimates, not a 339-city monitoring average.
Downloads and revisions
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The page CSV retains years, units, source IDs, verification status and comparability warnings. Each chart also offers its current data as CSV, PNG or SVG.
Page data
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Includes registered formal points, available historical series and scalar derived metrics. UTF-8 encoded for spreadsheets and analysis tools.
Download CSV ↓Data file updated: 3 Aug 2026
Citation
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Public record
Revision and update timeline
Air quality and pollution local candidate
Added 2021-2025 Ministry of Ecology and Environment monitoring averages for 339 prefecture-level and above cities, including PM2.5 and good-air-day trends and a 2025 pollutant snapshot. Population-weighted international exposure estimates are not spliced or ranked.
Related sources: Ministry of Ecology and Environment of the People's Republic of China ↗ · Ministry of Ecology and Environment of the People's Republic of China ↗ · Ministry of Ecology and Environment of the People's Republic of China ↗ · Ministry of Ecology and Environment of the People's Republic of China ↗ · Ministry of Ecology and Environment of the People's Republic of China ↗
Machine validated; not human editorial approval
Data downloads and revision timeline added
Added page-level formal-data CSV files, chart-level CSV/PNG/SVG exports and a bilingual revision timeline to all indicator pages.
Machine validated; not human editorial approval