Septic Pumping Schedule Calculator
Find out when your septic tank needs its next pump-out based on EPA guidelines.
A septic tank that goes too long between pumpings accumulates solids faster than bacteria can break them down. Once sludge reaches the outlet baffle, it migrates into the drain field and clogs the soil pores -- a failure that costs $5,000 to $20,000 to repair. Pumping on schedule is the single most effective way to prevent that. The intervals below are based on EPA and university extension service data for typical residential systems.
Your System Details
Most residential tanks are 1,000 or 1,500 gallons.
Garbage disposals increase solids by roughly 30%.
EPA Pumping Frequency Reference
Recommended pumping intervals in years based on tank size and household size. These assume average water usage and no garbage disposal.
| People | 750 gal | 1,000 gal | 1,250 gal | 1,500 gal | 2,000 gal |
|---|---|---|---|---|---|
| 1 | 4.4 yr | 5.8 yr | 7.3 yr | 8.7 yr | 11.6 yr |
| 2 | 3.2 yr | 4.2 yr | 5.3 yr | 6.3 yr | 8.4 yr |
| 3 | 2.4 yr | 3.2 yr | 4 yr | 4.8 yr | 6.4 yr |
| 4 | 2 yr | 2.6 yr | 3.3 yr | 3.9 yr | 5.2 yr |
| 5 | 1.5 yr | 2 yr | 2.5 yr | 3 yr | 4 yr |
| 6 | 1.1 yr | 1.5 yr | 1.9 yr | 2.3 yr | 3 yr |
| 7 | 0.9 yr | 1.2 yr | 1.5 yr | 1.8 yr | 2.4 yr |
| 8 | 0.8 yr | 1 yr | 1.3 yr | 1.5 yr | 2 yr |