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Septic Services in Hattiesburg, MS

Forrest County · Pop. 48,986

Hattiesburg is the largest city in Mississippi's Pine Belt region, home to the University of Southern Mississippi and Forrest General Hospital, the state's second-largest hospital. The city's position in the Longleaf Pine Coastal Plain gives it some of Mississippi's best-draining soils — the Ruston and McLaurin fine sandy loams that dominate the upland landscape allow excellent conventional septic system function, a significant contrast to the problematic Yazoo clay belt in central Mississippi and the saturated coastal soils of the Gulf Coast. This soil advantage makes Hattiesburg one of Mississippi's more favorable environments for on-site wastewater systems, and the city's regional growth has been supported by the relative ease of septic permitting compared to other parts of the state. However, the city's high annual rainfall — 62 inches, among the highest in the state — and the lower terrain soils that do have drainage constraints require homeowners to understand their specific site conditions. The University of Southern Mississippi's presence creates a sizeable student rental housing market where higher-than-average occupancy accelerates system wear, and Hattiesburg's role as a regional medical and commercial hub drives steady commercial development with engineering-grade system requirements.

Septic Providers in Hattiesburg (9)

Services in Hattiesburg

Drain Field Repair

$2,000 – $15,000

Grease Trap Pumping

$200 – $800

Septic Inspection

$300 – $600

Septic System Installation

$3,500 – $20,000

Septic Tank Pumping

$275 – $600

Septic Repair

$500 – $5,000

Well Drilling

$6,000 – $25,000

Well Pump Repair

$300 – $3,000

Well Water Testing

$50 – $500

Well Water Treatment

$500 – $8,000

Septic Service Costs in Hattiesburg

Service Average Cost
Septic Tank Pumping $225 - $415
Septic System Installation $4,500 - $15,000

Soil Conditions

Forrest County soils are Coastal Plain Ultisols — Ruston fine sandy loam, Susquehanna clay, and McLaurin fine sandy loam as dominant series. Ruston fine sandy loam is a well-drained Ultisol with argillic Bt horizon at 12-24 inches, clay content 25-35%, and excellent drainage on upland positions with water tables at 48-72 inches. McLaurin fine sandy loam is even better-drained with lighter-textured Bt. Susquehanna clay is a poorly structured, slowly permeable clay series that can create problematic drain field conditions on certain upland positions despite adequate water table depth. Lower terrain carries Myatt silt loam and Leaf clay — poorly drained soils with water tables within 12-24 inches.

Ruston fine sandy loam is the USDA benchmark well-drained Ultisol of the Southern Coastal Plain, widely studied for its suitable percolation characteristics for on-site wastewater. The argillic Bt horizon at 12-24 inches has moderate clay content (25-35%) that provides treatment capacity without restricting drainage to the slow range found in Piedmont clay soils. The deep water table (48-72+ inches) on upland Ruston positions means seasonal saturation is not a design concern, and the sandy loam texture above the argillic horizon allows rapid initial infiltration. McLaurin fine sandy loam, even lighter-textured, is similarly favorable but has even less clay in the Bt horizon and requires conservative loading rates to ensure treatment adequacy. Susquehanna clay, which forms in wetter landscape positions, has a massive, slowly permeable argillic horizon that can create perched water conditions even on apparently upland positions.

Water Table: Ruston and McLaurin upland soils: water tables 48-72+ inches. Myatt and Leaf soils in draws and lower terrain: 12-24 inches seasonally. Forrest County upland soils are among Mississippi's most favorable for conventional septic design.

Local Regulations

Forrest County Health Department enforces Mississippi's On-Site Wastewater Disposal rules under MS Code 41-67 and MSDH regulations. Site evaluations require both soil morphology assessment and percolation testing. Ruston and McLaurin soils on appropriate lots typically support conventional gravity systems. Susquehanna clay and Myatt silt loam soils require engineered designs. Setbacks: 75 feet from water supply wells, 50 feet from surface water, 10 feet from property lines. MSDH Licensed Installer Certificate required for all installation work. Commercial and multi-family developments require MSDH Engineering Section review.

Forrest County Health Department (Mississippi State Department of Health) issues On-Site Wastewater Disposal System permits under MS Code 41-67. Site evaluation includes soil morphology and percolation testing. The University of Southern Mississippi's approximately 14,000 students drive a rental housing market with significant septic usage. Hattiesburg's growth as a regional hub for the Pine Belt region creates steady permit demand. MSDH licensed installers required for all work.

Frequently Asked Questions — Hattiesburg

Are Hattiesburg area soils good for septic systems?
The upland Ruston and McLaurin fine sandy loam soils that dominate Forrest County's residential landscape are among Mississippi's best soils for conventional septic systems. Deep water tables, moderate clay content in the argillic horizon, and good natural drainage combine to create favorable conditions. Hattiesburg is much better-suited to conventional septic than central Mississippi's Yazoo clay zone or the Gulf Coast's saturated soils. The primary constraints are high annual rainfall on lower terrain soils and the Susquehanna clay series in select locations.
How much does septic pumping cost in Hattiesburg?
Septic pumping in Hattiesburg and Forrest County ranges from $225 to $415, with standard residential tanks averaging $250-$340. Mississippi's lower cost of living is reflected in septic service pricing — Hattiesburg is among the more affordable major Southern cities for septic pumping. Multiple contractors serve the Pine Belt region. MSDH recommends pumping every 3-5 years.
How does the University of Southern Mississippi affect septic demand near Hattiesburg?
USM's approximately 14,000 students and the surrounding university community create demand for off-campus rental housing, including homes in the suburban and semi-rural edges of Forrest County on septic systems. Student rental homes see higher water use intensity than typical residences. Property owners managing student rentals should pump tanks every 2-3 years and avoid rental setups with garbage disposals, which add significantly to septic tank solids. The university's hospital complex and associated medical campus development typically require engineering-grade sewer or advanced septic system design.
Does Hattiesburg's high rainfall (62 inches annually) cause problems for septic systems?
On upland Ruston and McLaurin soils, 62 inches of annual rainfall is generally manageable because these soils drain quickly. However, during extended wet periods — particularly in the winter rainy season when soils are already near saturation — even Ruston soils can temporarily reach capacity. Lower terrain properties with Myatt or Leaf clay soils are more vulnerable to seasonal saturation. Reducing household water use during wet periods and spacing laundry over several days rather than doing many loads on one day helps prevent system stress during high-rainfall episodes.
What happens to septic systems in Hattiesburg during tropical storm impacts?
Hattiesburg is approximately 70 miles from the Gulf Coast, far enough to be spared direct storm surge but close enough to receive catastrophic rainfall from landfalling hurricanes. Tropical systems like Katrina (2005) and Ida (2021) brought extensive flooding and heavy rain to Forrest County. Flooded drain fields temporarily lose absorption function, and submersion of septic tanks for extended periods can displace solids and affect tank buoyancy. After any major flooding event that inundates your drain field, have the system inspected and pumped before resuming heavy use. Do not use the system until floodwaters have receded.

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