Septic pumping in Barnstable County, Massachusetts costs $450-$900 (avg $650). A new septic system installation costs $8,850-$17,700. USDA soil data rates 0.3% of county soils as suitable for septic absorption fields. Approximately 11,725 homes in this county use septic systems.
Septic System Costs in Barnstable County
| Service | Low | Average | High |
|---|---|---|---|
| Pumping / Cleaning | $450 | $650 | $900 |
| Routine Inspection | $300 | $450 | $650 |
| Real Estate Inspection | $600 | $850 | $1200 |
| Minor Repair | $1,100 | $1,600 | $7,750 |
| Conventional Installation | $8,850 | $12,650 | $17,700 |
| Aerobic System Installation | $16,600 | $23,700 | $33,200 |
| Drainfield Replacement | $8,850 | $12,650 | $17,700 |
| Perc Test | $1,350 | $1,900 | $2,650 |
Cost estimates based on regional market data for Barnstable County, Massachusetts. Actual costs depend on system type, site conditions, and provider.
Soil & Septic Suitability in Barnstable County
Drainage Class
Excessively drained
Hydrologic Group
A
Unique Soil Types
46
Dominant Soil Types
| Soil Series | Coverage | Drainage | Hydro Group |
|---|---|---|---|
| Plymouth | 1070 | Excessively drained | A |
| Carver | 886 | Excessively drained | A |
| Barnstable | 745 | Well drained | A |
| Hinckley | 566 | Excessively drained | A |
| Merrimac | 507 | Somewhat excessively drained | A |
Septic Tank Absorption Field Suitability
USDA NRCS rates soil suitability for septic absorption fields across this county:
Overall rating: Very limited
Groundwater & Water Table in Barnstable County
Monitoring Wells
381
Avg Depth to Water
29 ft
Median Depth
21.1 ft
Shallowest Recorded
-1.4 ft Shallow Risk
Water table depths in this county are generally favorable for conventional septic systems.
Source: USGS National Water Information System. Based on 6994 measurements from monitoring wells.
Septic Regulations & Permits in Barnstable County
State Regulatory Body
Massachusetts DEP
Inspection Required for Home Sale
Yes
Nitrogen Reduction Areas
Yes
Advanced Treatment Required
In designated areas
Title 5 inspection mandatory within 2 years before property sale or 6 months after. Strict Cape Cod nitrogen rules.
Contact the Barnstable County health department for current permit requirements, fees, and approved system types.
Septic System FAQ for Barnstable County
How much does septic pumping cost in Barnstable County?
Septic pumping in Barnstable County, Massachusetts typically costs between $450 and $900, with an average of $650. Costs vary by tank size (1,000-1,500 gallons is typical), ease of access, distance from the pumping company, and how full the tank is. Most homeowners should pump their tank every 3-5 years.
How much does a new septic system cost in Barnstable County?
A conventional septic system installation in Barnstable County typically costs $8,850-$17,700. An aerobic treatment unit (ATU) costs $16,600-$33,200. Given the predominantly excessively drained soils in this area, some sites may require alternative system types. Costs include the tank, drainfield, permits, and labor.
Do I need a permit for a septic system in Barnstable County?
Yes. Virtually all counties in Massachusetts require a permit before installing, repairing, or replacing a septic system. The permit process typically involves a soil evaluation or percolation test, system design by a licensed professional, application to the county health department, and one or more inspections during installation. Contact the Barnstable County health department for current requirements and fees.
What soil types are in Barnstable County and how do they affect septic systems?
Barnstable County has predominantly Plymouth, Carver, Barnstable soils. The dominant drainage class is Excessively drained with hydrologic group A. The USDA rates 0.3% of surveyed soils as "Not Limited" for septic absorption fields, 0% as "Somewhat Limited", and 99.7% as "Very Limited".
Is a septic inspection required when selling a home in Barnstable County?
Yes. Massachusetts requires a septic system inspection as part of the property transfer process. This typically involves a certified inspector evaluating the tank, drainfield, and all system components. The inspection cost in this area averages $850. If the system fails inspection, repairs or replacement may be required before the sale can proceed.
How often should I pump my septic tank in Barnstable County?
The EPA recommends pumping your septic tank every 3-5 years for a typical household. The exact frequency depends on tank size, household size, and water usage. A 1,000-gallon tank serving a family of 4 should generally be pumped every 3 years. With approximately 11,725 septic systems in Barnstable County, there are many local providers offering regular pumping services.
Can I install a conventional septic system in Barnstable County?
It depends on your specific site. USDA soil data shows that 99.7% of soils in Barnstable County are rated "Very Limited" for septic absorption fields, while only 0.3% are "Not Limited." This means many properties will require alternative systems such as mound systems, pressure distribution systems, or aerobic treatment units. A percolation test ($1350-$2650) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Barnstable County?
A well-maintained septic system in Barnstable County typically lasts 25-30 years, though some components may need attention sooner. The concrete septic tank itself can last 40+ years, while the drainfield — the most critical and expensive component — usually lasts 15-25 years depending on soil conditions (Barnstable County has predominantly excessively drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.
Data last updated: 2026-04-13