DOI: 10.1093/rpd/ncad185 ISSN: 0144-8420

Countrywide monitoring of absorbed dose rate in air due to outdoor natural gamma radiation in India

Pratip Mitra, Manish K Mishra, Gade Priyanka Reddy, Saurabh Srivastava, Sandip S Salunkhe, Anisha Kumari, Sanjay G Gavas, Pruthviraj R Ninawe, Mukundan Thekkinkattil, Saurabh Garg, Aerattukkara Vinod Kumar
  • Public Health, Environmental and Occupational Health
  • Radiology, Nuclear Medicine and imaging
  • General Medicine
  • Radiation
  • Radiological and Ultrasound Technology


The Indian Environmental Radiation Monitoring Network continuously monitors, throughout India, the absorbed dose rate in air due to outdoor natural gamma radiation, by using Geiger–Mueller detector-based standalone environmental radiation monitors. The network consists of 546 monitors spread across 91 monitoring locations distributed all over the country. In this paper, the countrywide long-term monitoring results are summarised. The measured mean dose rate of the monitoring locations followed a log-normal distribution and ranged from 50 to 535 nGy.h−1 with a median value of 91 nGy.h−1. Due to outdoor natural gamma radiation, the average annual effective dose was estimated to be 0.11 mSv.y−1.

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