Soil has a great role in construction of any structure. In order to improve the behaviour of the soil, various ground improvement methods are available. Methods like chemical stabilisation, cement stabilisation has been adopted for stabilising cohesionless soils in the construction industry. The inherent drawbacks of these methods are not new to the industry. In the absence of a popular method which can act as an alternative to this, it has been widely used. Soil has microorganisms which are capable of developing strength in the soil, with modification of the existing environment. This is microbial geotechnology. Microbial geotechnology promises to provide a solution for the existing problems along with addressing the environmental issues related to other methods like chemical stabilisation. Work in the aspects of strength improvement has been going on in the world. Unlike conventional methods, the durability of Microbially Induced Calcite Precipitation (MICP) treated soils is of great concern and this paper makes an attempt to study the durability aspects of the MICP treated soils. This paper presents behaviour of MICP soils with respect to strength under different environmental conditions. The strength and durability of poorly graded sand (SP), silty sand (SM) and clayey sand (SC) soils were treated with MICP studied and compared in this paper