The world is becoming increasingly industrialized, technological revolution and innovation are proceeding at prodigious speeds, so that the number and diversity of electromagnetic (EMF) sources have increased significantly. Electricity has made our lives richer, safer and easier, but the transmission lines that carry it pose some health risks to the people who live around it due to the EMF they generate. Research was undertaken in 2015 to obtain information on the people living near these lines in the residential area of Kinshasa city. To this end, Magnetic Field (MF) measurements carried out there in 2015 and repeated in 2020 indicate that the average MF has increased over 5 years, notably in the axis of the line, notably from (0. 673 ±0.030) μT to (1.321 ±0.115) μT at Limete, (0.753 ±0.052) μT to (1.091 ±0.073) μT at Selembao and (1.017 ±0.095) μT to (1.342 ±0.102) μT at Bandalungwa. All these averages found in 2020 are increasingly above the threshold value of 0.400 μT.