Most clogs are attributed to hair, cooking grease or other solid materials not intended for sewer pipes. Many also use their toilets and garbage disposals as total catchalls and send items down that can cause troublesome clogs.
Even if there are no trees on your property’s sewer line, there may be growth from a neighbor’s yard. Tree roots have the potential to grow into pipes, cause holes or cracks, even wrapping themselves around the line and crushing it.
Older properties are more susceptible to having this issue because sewage lines used to be built with cast iron or clay piping which can easily break down compared to plastic, which is what is most commonly used today.