城市环境空气质量日数据集

该数据集是以城市为基本单位的结构化数据，根据《环境空气质量标准》(GB 3095-2012)及修改单、《环境空气质量指数(AQI)技术规定(试行)》(HJ 633-2012)、《环境空气质量评价技术规范（试行）》（HJ 663-2013）等有关要求，经自主加工后形成全面、系统且具有时效性的空气质量信息汇总，可直观反映不同城市在特定时间段内的空气质量状况，为AI模型在环境预测、污染溯源、智能预警等场景下的建模与优化提供高质量、可计算的数据支撑。
时间范围：2014年至今（近11年）
时间维度：日数据。
涵盖范围：全国超300个地级及以上城市。
指标参数：PM2.5、PM10、SO2、NO2、CO、O3浓度、空气质量指数（AQI）、空气质量等级、首要污染物、地理信息（经纬度）等。
数据提供方式：可按时间尺度或者按地域提供相关数据集，形式多样。

This dataset is city-based structured air quality data. It is a comprehensive, systematic and timely collection of air quality information formed through independent processing in accordance with relevant national standards and technical specifications, including Ambient Air Quality Standards (GB 3095-2012) and its amendments, Technical Regulations for Ambient Air Quality Index (AQI) (HJ 633-2012), and Technical Specifications for Ambient Air Quality Assessment (Trial) (HJ 663-2013). The dataset can intuitively reflect the air quality status of different cities within specific time periods, and provides high-quality, computable data support for AI models to conduct modeling and optimization in scenarios such as environmental prediction, pollution source tracing, and intelligent early warning.
Time Range: From 2014 to present (nearly 11 years)
Temporal Granularity: Daily data
Coverage: Over 300 prefecture-level and above cities across China
Indicators: PM2.5, PM10, SO2, NO2, CO, O3 concentrations, Air Quality Index (AQI), air quality grade, primary pollutant, geographic information (latitude and longitude), etc.
Data Provision Method: The relevant dataset can be provided by time scale or region, with diverse delivery formats.