Volume 3, Issue 3

Original research papers

Microwave, Laser, RF
and UV radiations


I. Topalova, Ts. Shalamanova, V. Zaryabova, M. Israel

Pages: 197–201

DOI: 10.21175/RadJ.2018.03.033

Received: 14 JUN 2018, Received revised: 17 NOV 2018, Accepted: 1 DEC 2018, Published online: 28 FEB 2019

There is a significant increase in the use of mobile communications services and it is expected that this growth will continue with the introduction of new generations of technology standards such as Long Term Evolution (LTE), for example. The exposure from environmental sources in urban areas is formed mainly by broadcasting antennas, and base stations for mobile communications. The large number of telecommunication sources placed in the urban areas provoked serious concerns about possible health effects, considering the exposure to electromagnetic fields (EMF). Particular attention has been paid to the so-called “critical” or “sensitive” areas around hospitals, schools, kindergartens, etc. Hence, there is a need of adequate exposure assessment of the electromagnetic field levels in some selected high populated urban areas especially around hospitals, schools, kindergartens to ensure that the power density levels are well below the prescribed threshold limits. The report presents an exposure assessment of electromagnetic field emitted by telecommunication sources (base stations) which has been performed at selected “sensitive” areas around hospitals, schools, kindergartens, located throughout Sofia. The study is conducted under the BG07 Program: Public Health Initiatives with the financial support of the Norwegian Financial Mechanism 2009-2014 and the European Economic Area Mechanism, 2009-2014, entitled “Improving control and information systems in risk prevention and healthcare”. Different methods of exposure assessments have been used: in-situ measurements (outdoor spot measurements of electromagnetic field values) using non- frequency selective and frequency selective measurement methods, as well as a broadband EMF monitoring for continuous measurement of the total EMF from all surrounding telecommunication sources that were also provided. The analyses of the measurement results suggest that the exposure levels to RF-EMFs are generally well below the reference levels defined by the national and European legislation. The electromagnetic field levels at the most studied locations are lower (up to 50%) than the limit values according to the Bulgarian legislation and less than 1% of the limit values according to the European legislation for the frequency band about 900 MHz.
  1. J. T. Rowley, K. H. Joyner, “Comparative international analysis of radiofrequency exposure surveys of mobile communication radio base stations,” J. Expo. Sci. Environ. Epidemiol., vol. 22, no 3, pp. 304 – 315, May-Jun. 2012.
    DOI: 10.1038/jes.2012.13
    PMid: 22377680
    PMCid: 3347802
  2. W. Joseph, L. Verloock, F. Goeminne, G. Vermeeren, L. Martens, “Assessment of general public exposure to LTE and RF sources present in an urban environment,” Bioelectromagnetics, vol. 31, no 7, pp. 576 – 579, Oct. 2010.
    DOI: 10.1002/bem.20594
    PMid: 20607741
  3. Ts. Shalamanova at al., “Results of Measurements of Electromagnetic Fields around Base Stations for Mobile Communication in Bulgaria,” in Proc. 9th Nat. Conf. Biomedical Physics and Engineering, Bulgaria, 2004, pp. 129 – 134.
  4. M. Ivanova, Ts. Shalamanova, “Measurements of RF radiation around base stations for mobile communication in Bulgaria,” J. Environ. Prot. Ecol., vol. 6, no. 2, pp. 328 – 336, Jan. 2005.
    Retrieved from: https://23fc9e25-a-b7e9b206-s-sites.googlegroups.com/a/jepe-journal.info/jepe-journal/vol-6-no-2/V6N2328-3362005.pdf;
    Retrieved on: Aug. 12, 2018
  5. M. Israel, Iv. Topalova, Ts. Shalamanova, M. Ivanova, V. Zaryabova, “Methods for selection of measurement points in urban areas with high density of EMF sources and such with “sensitive places and buildings,” Journal of Biomedical and Clinical Research, vol. 8, no. 1, suppl. 1, 2015.
    Retrieved from: https://ephconference.eu/repository/countries/Abstract_Book_Vol_8-1Suppl.pdf;
    Retrieved on: Aug. 10, 2018
  6. Basic standard for the in-situ measurement of electromagnetic field strength related to human exposure in the vicinity of base stations, EN ISO 50492:2008, Jan. 31, 2009.
    Retrieved from: https://shop.bsigroup.com/ProductDetail/?pid=000000000030268384;
    Retrieved on: Aug. 12, 2018
  7. Basic standard on measurement and calculation procedures for human exposure to electric, magnetic and electromagnetic fields (0 Hz – 300 GHz), EN ISO 50413:2008, Jan. 1, 2008.
    Retrieved from: https://infostore.saiglobal.com/en-gb/standards/i-s-en-50413-2008-873723_SAIG_NSAI_NSAI_2077363/;
    Retrieved on: Aug. 12, 2018
  8. Министерство на здравеопазването. (14.03.1991). Наредба № 9 от 14.03.1991 г. за пределно допустими нива на електромагнитни полета в населени територии и определяне на хигиенно-защитни зони около излъчващи обекти. (Ministry of Health. (Mar. 14, 1991). Ordinance No. 9 from 14.03.1991 on the limit values of electromagnetic fields in populated areas and the determination of hygienic-protective zones around radiating objects.)
    Retrieved from: http://econ.bg/Нормативни-актове/Наредба-9-от-14-03-1991-г-за-пределно-допустими-нива-на-електромагнитни-полета-в-населени-_l.l_i.128561_at.5.html;
    Retrieved on: Aug. 13, 2018
  9. The Council of the European Union. (Jul. 12, 1999). 1999/519/EC Council Recommendation of 12 July 1999 on the limitation of exposure of the general public to electromagnetic fields (0 Hz to 300 GHz).
    Retrieved from: https://www.anacom.pt/streaming/1999-519-CE.pdf?contentId=33252&field=ATTACHED_FILE
    Retrieved on: Aug. 13, 2018