You would think Minnesota would be the land of frozen septic systems. But the truth is it has only been the last few years that this has become an issue. The reasons we are seeing more frozen systems are:Design changesIn the old days, systems were deep, placed well below the frost line. This kept freezing to a minimum (those that did freeze were cases of a plumbing leak flooding the entire area, broken pipes, etc). Today, systems are designed closer to the surface because a shallow system provides better treatment. But even shallow systems don’t freeze (under normal conditions) because
