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Septic Services in Clarksville, TN

Montgomery County · Pop. 166,722

Clarksville is Tennessee's fifth-largest city and one of its fastest-growing, driven almost entirely by the economic and population influence of Fort Campbell — one of the largest U.S. Army installations in the world, straddling the Kentucky-Tennessee state line just north of the city. The combination of military personnel, defense contractors, veterans who stay after service, and families following soldiers has created a suburban real estate market of extraordinary pace, pushing development well into Montgomery County's rural landscape. Much of that development relies on on-site sewage systems. The county's dominant soil challenge is the fragipan — a naturally cemented, nearly impermeable subsurface layer found in the Dickson and related silt loam soils that cover most of the Highland Rim landscape. A fragipan creates a perched water table above it each winter and spring, turning otherwise-suitable-looking silt loam soils into a septic designer's challenge. Tennessee's soil morphology-based evaluation system (which replaced percolation tests in 2009) is specifically calibrated to identify fragipan depth and thickness, and understanding how that evaluation works is essential for any Clarksville-area property owner or buyer.

Services in Clarksville

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Drain Field Repair

Restore or replace failed leach fields and drain lines to prevent sewage surfacing and groundwater contamination.

$2,000 – $15,000

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Grease Trap Pumping

Commercial grease trap cleaning and pumping to prevent sewer blockages and maintain health code compliance.

$200 – $800

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Septic Inspection

Comprehensive evaluation of your septic system's condition, required for real estate transactions in most states.

$300 – $600

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Septic System Installation

Complete new septic system design and installation, from perc testing to final inspection.

$3,500 – $20,000

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Septic Tank Pumping

Regular pumping removes accumulated solids from your septic tank, preventing backups and extending system life.

$275 – $600

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Septic Repair

Diagnose and fix septic system problems including leaks, clogs, baffle failures, and component replacements.

$500 – $5,000

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Well Drilling

Professional water well drilling for residential and commercial properties without access to municipal water.

$6,000 – $25,000

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Well Pump Repair

Diagnose and repair well pump failures, pressure tank issues, and water flow problems.

$300 – $3,000

Septic Providers in Clarksville (7)

RS

Richards Septic Tank Service Verified

Nashville, TN 37207

Richards Septic Tank Service has been serving Nashville and Middle Tennessee for years from their location on Alhambra Circle. Open 24 hours for emergency service, they specialize in residential and commercial septic tank pumping and repair.

Septic PumpingSeptic Repair
(615) 262-0667 View Profile

Septic Service Costs in Clarksville

Service Average Cost
Septic Tank Pumping $265 - $475
Septic System Installation $6,000 - $20,000

Soil Conditions

Montgomery County soils are dominated by Dickson silt loam, Sango silt loam, and Baxter cherty silt loam — Alfisols and Ultisols of the Highland Rim and Western Valley. Dickson silt loam has a fragipan horizon at 18-30 inches — a naturally cemented, very firm, slowly permeable layer that severely restricts downward water movement. The fragipan has saturated hydraulic conductivity of 0.01-0.06 in/hr. Sango silt loam lacks a fragipan but has a dense argillic Bt horizon with moderate clay accumulation. The Cumberland River floodplain carries Hamblen and Newark soils — frequently flooded Entisols with shallow water tables.

The Dickson silt loam series is the USDA NRCS benchmark Alfisol of the Highland Rim province, well-characterized for its fragipan at 18-30 inches. The fragipan (Bx horizon) is a subsurface layer with strong coarse prismatic or blocky structure, extremely firm dry consistence, and brittle failure characteristics — a result of silica and sesquioxide cementation under alternating wet and dry conditions over thousands of years. Saturated hydraulic conductivity of the fragipan is 0.01-0.06 in/hr — essentially a barrier to vertical drainage. Above the fragipan, the silt loam surface horizon is moderately permeable; below it, fragmented material allows some lateral drainage. Effective drain field design must stay above the fragipan, require elevation via mound construction, or use drip distribution on the native soil surface above the restrictive layer.

Water Table: The Dickson fragipan creates a perched seasonal water table above it at 12-24 inches for 2-4 months annually. Below the fragipan, water tables are deeper. Floodplain soils have seasonal water tables near the surface.

Local Regulations

Tennessee's subsurface sewage disposal system rules under TCA 68-221-401 are administered by TDEC with Montgomery County Environmental Health handling local inspections. Soil evaluations must document all restrictive layers including fragipan horizon depth, texture, and structure. The fragipan disqualifies conventional in-ground trenches in Dickson soils; mound systems or at-grade systems in imported fill are the typical alternatives. Tennessee requires installers to hold TDEC licenses with appropriate certification levels (I or II). Systems must be set back 50 feet from water supply wells, 25 feet from surface water, and 10 feet from property lines.

Tennessee Department of Environment and Conservation (TDEC) and Montgomery County Environmental Health jointly administer subsurface sewage disposal system (SSDS) permits under Tennessee Code Annotated 68-221-401 et seq. Site evaluation uses soil morphology analysis — Tennessee eliminated percolation testing in 2009. The fragipan in Dickson soils frequently requires mound or at-grade systems. Clarksville's fast growth from Fort Campbell expansion drives high permit volume. Licensed installers must be certified by TDEC.

Frequently Asked Questions — Clarksville

What is a fragipan and why does it matter for septic systems in Clarksville?
A fragipan is a naturally cemented subsurface soil layer found in Dickson and related silt loam soils across Montgomery County and much of the Highland Rim in Tennessee and Kentucky. It typically occurs 18-30 inches below the surface and is nearly impermeable — less than 0.06 inches per hour. Conventional septic drain fields placed below the fragipan cannot drain. Fields placed above it work until the perched seasonal water table rises above the trench bottom each winter and spring. Most Clarksville-area properties on Dickson soils need mound systems or at-grade systems in imported fill to function properly.
How does Fort Campbell's growth affect septic system demand in Clarksville?
Fort Campbell's approximately 30,000 active-duty soldiers, plus their families and the defense contractor workforce, drive continuous residential construction in Montgomery County. New housing developments beyond the city sewer service area require OSSF permits, and TDEC and Montgomery County process a high volume of applications. The rapid growth also means older systems installed in the 1980s and 1990s during previous growth waves are reaching replacement age. The high-turnover military housing market means system maintenance history may be incomplete for purchased homes.
How much does septic pumping cost in Clarksville?
Septic pumping in Clarksville and Montgomery County ranges from $265 to $475. Standard residential tanks average $300-$400. The active military community creates steady demand for septic services across the county, supporting multiple well-established contractors. Tennessee's standard recommendation is pumping every 3-5 years.
My Clarksville area home has a mound system — is that normal?
Yes, mound systems are common throughout Montgomery County wherever Dickson silt loam soils with fragipan are encountered — which is much of the county's residential landscape. A mound system places the drain field in engineered fill above the native soil surface, maintaining the required separation distance from the seasonal high water table that develops above the fragipan. Properly designed and maintained mound systems function as well as conventional in-ground systems. They do require careful attention to cover vegetation (grass, no woody plants), and the mound area should never be driven over or used for construction.
Is the Cumberland River in Clarksville a concern for nearby septic systems?
Properties within the Cumberland River floodplain and its tributary streams in Montgomery County face seasonal flooding risk that directly affects septic systems. Floodwater inundates drain fields, can float tanks, and disrupts normal aerobic decomposition in the drain field. Hamblen and Newark floodplain soils are also unsuitable for septic systems. Clarksville's Corps of Engineers-controlled Lake Barkley reservoir affects Cumberland River water levels above the city. Property owners in the river floodplain (FEMA flood zone AE) should have flood insurance that covers septic system damage as a component of structural coverage.

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