One way to determine if your home has a septic system is to check your property records. The property deed, building permit and design plans for your home and property will likely contain information about the presence of a septic system. In some cases, there may be visual signs you have a septic system. For example, for some septic systems a mound or small hill is created for the installation of the drainfield. Also, if you follow the plumbing outlet leaving your home, you might find an access riser with black or green lids.