The pollution of the atmosphere through the release of significant quantities of gaseous industrial pollutants leads to rainwater contamination, rendering it corrosive to terrestrial rocks and soils. Furthermore, the trend of aridification in the Republic of Moldova is altering the dynamics of rainfall patterns. This trend is characterized by a reduction in the duration of rainfall events and an escalation in their intensity, resulting in a higher rate of rainwater flow per unit of time. In such circumstances, despite a roughly similar volume of rainwater, the consequences are markedly different, as the potential for soil erosion is on the rise. The objective of this research was to assess the influence of rainwater chemical composition and specific conditions on the process of soil particle washing. The action of rainwater washing soil not only depletes the soil itself but also results in the sedimentation of lakes and ponds, leading to the clogging of surrounding areas. Consequently, this phenomenon can cause natural lakes and, particularly, man-made reservoirs (such as dam lakes) to become murky and silt-laden. Following the analysis of the results of a series of rainwater samples collected on the territory of the Republic of Moldova and other regions presented in scientific publications, three types of rainwater were modeled: “Moderate” in which HCO3 - ions predominate along with CO2∙H2O, NH3∙ H2O; “Acid” (in which strong acid anions Cl-, NO3 -, SO4 2- predominate along with HCO3 -, CO2∙H2O, NH3∙H2O, etc.; and “Ammoniacal” (in which the ammonium ion predominates along with HCO3 -, CO2∙H2O and the anions of strong acids). Diluted versions (by 2, 4, 8 times) of these three rainwater types were as well modeled. In all types of rainwater CO2 was obtained supersaturated. To get the pH titration curves, the automatic titrator 848 Titrio plus was used. COD, Ca2+, Mg2+ et al. were carried out according to the accepted methodology. For the soil washing research, three types of soils, well known in the Republic of Moldova (Typical Chernozium, Clay Carbonate Chernozium and Argiloiluvial Chernozium) and the most aggressive types of rainwater (Acid and Ammoniacal) were used in models. The multiple freeze/thaw cycle was practiced in order to understand the effect of the winter period. The following important conclusions were obtained: 1) strong Acid rainwater solubilizes calcareous rock most strongly; 2) CO2 and NH3 are the main components that retain the washing/hydrating properties of limestone particles;3) by the dilution of the mineral component of rainwater, the limestone washing activity is best preserved in Ammoniacal rainwater; 4) Typical Cernoziom soil is the most resistant to the aggressiveness of the rains; 5) the vulnerability of the soils gradually increases in the Typical Cernozium, Clay-Carbonate Cernozium and Argiloiluvial Cernozium consequence; 6) the study of changes in soils at low temperatures demonstrates the strengthening of their stability after multiple freezes.