Septic tanks are not the best way to treat wastewater. The effluent (waste water) from a septic tank is still polluted and needs to be treated before it is released back into the environment. Septic tanks can also be smelly and create a health hazard if they are not maintained properly. In addition, septic tanks can overflow during heavy rainstorms, leading to pollution of local waterways.
Septic tanks can have a lot of disadvantages, the main one being that they can easily become overwhelmed and overflow. This can cause raw sewage to flow into the environment and contaminate both land and water. Septic tanks also require regular maintenance in order to keep them functioning properly. If the tank isn't pumped out often enough, solids will begin to build up and will eventually block the drainage field. This will result in sewage backing up into the home or flowing out onto the ground. Finally, septic tanks are not very environmentally-friendly. They produce harmful greenhouse gases that contribute to climate change, and they also release pollutants into groundwater and surface water supplies.
