Septic system

A septic system is an on-site wastewater treatment system used by approximately 21 million U.S. homes not connected to municipal sewer systems.

10 steps across 1 sections

1. Steps Guide

  • Know your system — Locate your septic tank and drain field. Obtain the as-built drawing from your county health department. Know the tank size (typically 1,000-1,500 gallons), system type (conventi...
  • Schedule regular inspections — Have a licensed septic professional inspect the system every 1-3 years. Inspections include checking sludge and scum levels, examining baffles and tees, testing for l...
  • Pump the tank on schedule — A typical household septic tank should be pumped every 3-5 years. Frequency depends on household size, tank capacity, water usage, and garbage disposal usage. The pumper...
  • Monitor water usage — Excessive water overwhelms the system. Fix leaky faucets and running toilets promptly. Spread laundry loads across the week. Use high-efficiency fixtures and appliances to red...
  • Protect the drain field — Never drive or park on the drain field. Do not plant trees or shrubs nearby (roots infiltrate pipes). Do not build structures over the drain field. Direct roof drains and ...
  • Watch what goes down the drain — Never flush non-biodegradable items (wipes, feminine products, diapers, cigarette butts). Minimize grease and cooking oils. Avoid pouring chemicals (paint, solvents...
  • Avoid septic tank additives — The EPA and most health departments advise against septic additives. They are not necessary for normal system function, may harm beneficial bacteria, and can push soli...
  • Recognize warning signs — Slow drains throughout the house, sewage odors near the tank or drain field, standing water or lush green patches over the drain field, sewage backups in the house, and gu...
  • Maintain records — Keep records of all pumping, inspections, repairs, and permits. These are required during property sales and help track system health over time.
  • Plan for replacement — Septic systems eventually fail. Common causes include drain field saturation, tank deterioration, and soil condition changes. Budget for eventual replacement ($15,000-$30,000+).

Common Mistakes

  • Skipping regular pumping
  • Flushing "flushable" wipes
  • Using excessive water
  • Planting trees near the drain field
  • Using chemical drain cleaners

Pro Tips

  • Keep the inspection records in your home file
  • Install effluent filters
  • Spread water usage throughout the day
  • Use a septic-safe toilet paper
  • Know the system's age and type

Sources

Related Checklists