Drop shafts are frequently used to connect sewer collectors located at different depths. The most important wastewater fall factor is the impact of the drop shaft design on the dissipation of flow energy in the lower pool and the intensity of the release of harmful sewer gases into the under-roof space of the structure. An insufficient dissipation of the flow energy as it passes through the drop shaft and a high flow rate in the energy-dissipating well may cause rapid wear and intensify gas corrosion of the reinforced concrete structures. A high turbulence of wastewater flow increases the sewer gas release rate. Excessive gas accumulation in structures causes its further release into the urban environment and adversely affects human health. Therefore, it is crucial to study the impact of drop shaft design on the sewer gas release and develop recommendations to address this issue.