Septic systems are inherently basically gross. They are, after all, very large containers of human waste. Many things can go wrong if they're not properly and regularly maintained. Here are some of the horrible things occasionally seen. There are things that you can do to prevent them from happening to you! 1. Build-up of human waste Assuming that “treatment chemicals” will keep the septic system clean and allowing sludge (solids…raw garbage & human waste) to build up – not