My subsurface system is 30 years old, why won it work anymore?
Subsurface lateral fields rely on the soil to absorb and treat the sewage that passes through the septic tank and eventually trickles out of the lateral pipe/chamber. At some point the soil may lose its ability to absorb due to various factors. A subsurface system is not expected to last forever. Just like a car or an air conditioner or a refrigerator, it will fail and it will need to be replaced. Some last much longer than others so to put an expected number of years would be futile. Just know that any system can and probably will fail eventually, either by improper maintenance, abuse, or just naturally wear out.
