Introduction: Electromagnetic fields (EMF) are commonly used in hospitals to detect and treat certain diseases or ailments, exposing healthcare workers daily to such fields and casting doubts about workers and patients safety. Objectives: To quantify the actual exposure to high-frequency electric fields of workers and public hospitals users in the Balearic Islands (Spain) and the compliance with the references levels established by the International Commission on Non-Ionizing Radiation Protection (ICNIRP). Material and Methods: High-frequency radiation exposure levels were measured in different areas and compared with ICNIRP levels and Spanish regulation, using a broadband field strength meter and a spectrum analyzer. Results: 1,290 measurements were performed obtaining a median electric field of 0.31 V/m (1st quartile: 0.16 V/m; 3rd quartile: 0.67 V/m). Users and workers are exposed to electric fields from 0.19 V/m to 0.25 V/m in all areas, but Rehabilitation and Radiology. In the former, the patients (not under microwave therapy) are exposed to EMF between 1.87 V/m and 25.71 V/m. Discussion and conclusions: Although effective electric field values are lower than the reference levels, measures should be taken to reduce exposure of especially sensitive people (infants, children, pregnant women,…) and ensure regular monitoring of the exposure.

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