The amount of time it takes for water to be filtered through air stripping can vary from system to system depending on the size of the tank or how quickly water can flow through the device. The typical amount of time water takes to be filtered is around a few minutes. Though, other studies suggest that it can take far longer depending on the type of and concentration of substance. For instance, higher levels of NH3-N, a common contaminant in ground water, can take several hours of air stripping in order to be properly removed from water.  In a recent study, it took 4 hours to for the air stripper to reach an equilibrium of efficiency in removing NH3-N elements, topping off at an 81.9% removal rate. Comparatively, only 30.7% of NH3-N elements were removed at 10 minutes, suggesting that removal of contaminants of water correlates with the amount of time spent air stripping.