Mound Septic System Cost in Pennsylvania
Estimated 2026 installed range: $11,200 – $24,600
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Open the cost calculatorWhy Pennsylvania prices differ
Statewide cost drivers here are freeze depth, bedrock and older housing stock. Locally, septic permits are handled by local sewage enforcement officers. That is why a mound system in Pennsylvania can land well above or below the national range of $10,000–$22,000.
All system types in Pennsylvania
| System | Low | High |
|---|---|---|
| Conventional | $3,900 | $9,000 |
| Chamber | $5,600 | $12,300 |
| Aerobic / ATU | $9,000 | $20,200 |
| Mound | $11,200 | $24,600 |
| Sand filter | $9,000 | $17,900 |
What mound systems are for
A mound system raises the drain field above the ground when the water table is high or soil is shallow. It is one of the most expensive common options.