Help for Tree Roots in a Septic Tank

Septic tanks should not be installed near trees.

Septic systems shouldn't be located near trees because tree roots can grow into the lines and plug them up. If you have tree roots growing into your septic tank, there are a couple of actions you can take, but the only permanent solution is to remove the trees.

Mechanical

Mechanical augers can be used to remove tree roots from your septic system. The spiral head of the auger has teeth, similar to a reciprocating saw blade. When the power is turned on, the auger rotates, cutting through the roots. However, the roots remain in the system and can grow back unless they're removed or chemically destroyed.

Copper Sulfate

Copper sulfate will destroy tree roots. Flush 2 pounds of copper sulfate crystals per 300 gallons of tank capacity down the toilet. Roots will not die instantly but will break off and die over time.

Barriers

Install a barrier between your septic system and any nearby trees. The barrier should run from the top of the soil to a depth of 2 feet and should be located 3 feet from the drain field and 5 feet from the tree. In addition, the barrier should extend down the entire length of the field so roots can't just grow around the barrier.

References

• University of Georgia Cooperative Extension: Septic Tank Maintenance and Care; Cecil Hammond
• Virginia Cooperative Extension: Planting on Your Septic Drain Field; Susan D. Day; May 1, 2009
• Lowe's Commercial Services: 5 Steps to Dealing with Invasive Tree Roots; Mark Terry; May 2006

Resources

• University of Minnesota: Tree Root Behavior and Their Interactions ...