A septic system is an underground wastewater treatment structure. Household water flows into a septic tank, where heavy solids settle to the bottom (sludge) and oils/grease float to the top (scum). Beneficial bacteria break down the waste, and the treated liquid (effluent) flows out into an underground drainfield (leach field) for natural soil filtration.
You can check your property deeds, building permits, or as-built site plans at your local health or environmental department. If records are missing, look for lawn depressions, riser lids, or hire a professional septic contractor to locate it using specialized tools.
Most septic tanks should be pumped every 3 to 5 years. The exact schedule depends on your household size, tank capacity, and water usage.
The U.S. Environmental Protection Agency (EPA) recommends having a qualified service expert inspect your septic system at least every 3 years. Mechanical or aerobic systems may require annual check-ups.
- Septic tanks (concrete, polyethylene, or fiberglass) typically last 50 or more years.
- Drainfields generally last 25 to 30 years, provided they are well-maintained and protected.
Flush only human waste and toilet paper.
- Avoid flushing or washing down items that disrupt bacterial action or clog the lines, including:
- Non-flushable wipes (baby wipes, makeup wipes)
- Feminine hygiene products and diapers
- Cooking grease, fats, and oils
- Cat litter, paper towels, and cigarette butts
- Paints, thinners, strong bleach, or harsh chemical drain cleaners
- Watch out for these warning signs:
- Slow-draining sinks and tubs, or frequent plumbing backups
- Unpleasant sewage odors around your yard or home
- Patches of unusually lush, green grass over the drainfield even during dry weather
- Standing water or soggy, saturated soil near the tank or drainfield
Stop using water immediately to prevent further overflow, and call a licensed septic service professional or local health authority right away. Do not attempt to open or service the tank yourself.