Septic Systems in Dillon County, SC

Regulations, costs, soil data & local providers

Pop. 28,292 ~48% on septic ~5,432 septic homes Well drained soil

Septic pumping in Dillon County, South Carolina costs $250-$500 (avg $350). A new septic system installation costs $5,050-$10,100. USDA soil data rates 0% of county soils as suitable for septic absorption fields. Approximately 5,432 homes in this county use septic systems.

Septic System Costs in Dillon County

ServiceLowAverageHigh
Pumping / Cleaning$250$350$500
Routine Inspection$200$250$350
Real Estate Inspection$350$500$700
Minor Repair$650$900$4,400
Conventional Installation$5,050$7,200$10,100
Aerobic System Installation$9,450$13,500$18,900
Drainfield Replacement$5,050$7,200$10,100
Perc Test$750$1,100$1,550

Cost estimates based on regional market data for Dillon County, South Carolina. Actual costs depend on system type, site conditions, and provider.

Soil & Septic Suitability in Dillon County

Drainage Class
Well drained
Hydrologic Group
A
Unique Soil Types
39

Dominant Soil Types

Soil SeriesCoverageDrainageHydro Group
Summerton 296 Well drained C
Varina 200 Well drained C
Dothan 200 Well drained C
Faceville 200 Well drained C
Fuquay 200 Well drained A

Septic Tank Absorption Field Suitability

USDA NRCS rates soil suitability for septic absorption fields across this county:

Not Limited (Good)0%
Somewhat Limited8.6%
Very Limited91.4%

Overall rating: Very limited

Source: USDA NRCS Soil Survey Geographic Database (SSURGO)

Groundwater & Water Table in Dillon County

Monitoring Wells
8
Avg Depth to Water
29.3 ft
Median Depth
37.2 ft
Shallowest Recorded
3.2 ft Shallow Risk

Water table depths in this county are generally favorable for conventional septic systems.

Source: USGS National Water Information System. Based on 62 measurements from monitoring wells.

Septic Regulations & Permits in Dillon County

State Regulatory Body
South Carolina DHEC
Inspection Required for Home Sale
No / Varies
Nitrogen Reduction Areas
No
Advanced Treatment Required
In designated areas

DHEC issues permits statewide. Soil evaluation required for new installations.

Contact the Dillon County health department for current permit requirements, fees, and approved system types.

Septic System FAQ for Dillon County

How much does septic pumping cost in Dillon County?
Septic pumping in Dillon County, South Carolina typically costs between $250 and $500, with an average of $350. 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 Dillon County?
A conventional septic system installation in Dillon County typically costs $5,050-$10,100. An aerobic treatment unit (ATU) costs $9,450-$18,900. Given the predominantly well 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 Dillon County?
Yes. Virtually all counties in South Carolina 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 Dillon County health department for current requirements and fees.
What soil types are in Dillon County and how do they affect septic systems?
Dillon County has predominantly Summerton, Varina, Dothan soils. The dominant drainage class is Well drained with hydrologic group A. The USDA rates 0% of surveyed soils as "Not Limited" for septic absorption fields, 8.6% as "Somewhat Limited", and 91.4% as "Very Limited".
How often should I pump my septic tank in Dillon 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 5,432 septic systems in Dillon County, there are many local providers offering regular pumping services.
Can I install a conventional septic system in Dillon County?
It depends on your specific site. USDA soil data shows that 91.4% of soils in Dillon County are rated "Very Limited" for septic absorption fields, while only 0% 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 ($750-$1550) and soil evaluation are required before the county will approve a system design.
How long does a septic system last in Dillon County?
A well-maintained septic system in Dillon 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 (Dillon County has predominantly well drained soils). Regular pumping every 3-5 years and avoiding excess water usage are the two most effective ways to extend system life.

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Quick Facts

Population28,292
Est. Septic Homes5,432
Avg Pumping Cost$350
Drainage ClassWell drained
Septic SuitabilityVery limited

More in South Carolina

Marion County Marlboro County Florence County Darlington County Horry County Chesterfield County

Common Septic Services

Pumping: $250-$500
Inspection: $200-$350
Repair: $650-$4,400
Installation: $5,050-$10,100

Data last updated: 2026-04-13