Real-time monitoring of microbial activity in porous media is still facing critical challenges because conventional analytical procedures are intrusive. Induced polarization (IP) has shown promises as a non-intrusive monitoring approach of such process. However, there is still a lack of quantitative analysis of soil column experiments to show how IP-based parameters can be related to the density of bacteria. The evolution of bacteria density and induced polarization is here performed in a soil-packed column experiment...