How often should you pump your septic tank?

Enter your tank size and the number of people in your home. You'll get a pumping interval from a published state guideline and a cost range from 2026 national cost guides.

Tank size People in the household Water use

AFFILIATE SLOT: septic tank risers, effluent filters, or a maintenance record folder (no affiliate IDs yet). Note: EPA and SC DES advise against additives; don't promote "septic treatments" as a substitute for pumping.

Where the numbers come from

Pumping interval table: South Carolina DES, Septic Tank Preventative Maintenance (1,000/1,250/1,500 gal tanks; 1, 2, 4, 6, 8 residents).
General rule: inspect at least every 3 years and pump typically every 3–5 years. Factors are household size, wastewater, solids and tank size: US EPA, How to Care for Your Septic System.
Cost by tank size: Angi 2026 (national avg $428; most pay $292–$565) and HomeGuide 2026 ($300–$700; $0.30–$0.70/gal). Angi lists Milwaukee, WI at $245–$320.

EMAIL SIGNUP PLACEHOLDER: "Get a reminder when it’s time to pump, test, or flush." (Not connected; pick an email provider before launch)