Many homes have their own septic tank, and it's critical to have it regularly maintained. Have it inspected every two to three years, depending on usage. Your septic inspection will show any leaks, cracks or potential problems that can be addressed before a future total breakage or failure. Failing septic tanks aren't just costly to repair, they can also leak pollutants into our waterways, which leads to groundwater contamination. One way to keep your septic tank happy is to never toss items like dental floss, diapers, cigarette butts, paper towels, paint and harmful chemicals down the drain. They can all cause clogs, erosion and other problems.