dmariaa70/METRAQ-Air-Quality

The METRAQ air quality dataset

This is the official dataset repository for the METRAQ air quality dataset.

METRAQ air quality is an air quality dataset comprising hourly measurements of up to 14 pollutants from January 1, 2001, to December 31, 2024. In addition, the dataset has been spatially and temporally aligned with up to seven meteorological parameters (available since January 1, 2019) and three traffic monitoring metrics, aggregated using five different interpolation methods since January 1, 2015.

This enriched subset includes a total of 64,881,744 rows distributed as follows: 25,535,832 (39.36%) air quality data, 8,838,144 (13.62%) meteorological data and 30,507,768 (47.02%) traffic data.

To the best of our knowledge, METRAQ is the largest and most comprehensive dataset available to date in terms of covariates closely related to air quality. Furthermore, we provide baseline models for both forecasting and spatio-temporal imputation of air pollutant concentrations. METRAQ is a high-quality, multifaceted dataset designed to support the development of data-driven models that can inform public policy and regulatory decisions aimed at minimizing the impact of pollution on citizens' health and well-being.

📊 Statistics

• Total number of timestamps: 210,384 between 01/01/2013 00:00:00 and 31/12/2024 23:00:00
• Total number of records: 64,881,744
  • Air quality: 25,535,832 (39.36%) since 01/01/2013 00:00:00
  • Meteorology: 8,838,144 (13.62%) since 01/01/2019 00:00:00
  • Traffic: 30,507,768 (47.02%) since 01/01/2015 00:00:00

🔧 Tools and Code

• 📦 Dataset: Hugging Face Dataset Page
• 🛠️🧪 Source code and experiments: Metraq source code

💾 Data sources

The original data published in this dataset is available on the Open Data Portal of the City Council of Madrid (Spain).

📄 License

This project is licensed under the MIT License.

You are free to:

• ✅ Use the dataset for commercial and non-commercial purposes
• ✅ Modify, distribute, and build upon the dataset
• ✅ Incorporate it into your own models, research, or applications

As long as you include the following notice in your work:

Copyright © 2023 David María Arribas [email protected]
This software and dataset are provided "as is", without warranty of any kind, express or implied.

The full license text is available here.

📚 Citation

If you use METRAQ Air Quality dataset in your research, please cite our work using the following format (citation will be updated upon paper publication):

@misc{david_maría-arribas_2025,
    author       = { David María-Arribas and Alejandra  Abalo-García and Antonio S. Montemayor and Juan J. Pantrigo and Alfredo Cuesta-Infante },
    title        = { METRAQ-Air-Quality },
    year         = 2025,
    url          = { https://huggingface.co/datasets/dmariaa70/METRAQ-Air-Quality },
    doi          = { 10.57967/hf/5519 },
    publisher    = { Hugging Face }
}