Arkansas Septic Tank Laws: Permits, Setbacks, and Maintenance

Arkansas septic tank laws require a permit from the Arkansas Department of Health (ADH) before anyone installs, repairs, or alters an onsite wastewater system, and violations are misdemeanors carrying fines of $100 to $1,000 per conviction.¹ The rules come from the Arkansas Sewage Disposal Systems Act (Ark. Code § 14-236-101 et seq.), and the ADH’s Division of Environmental Health Protection administers them statewide through local Environmental Health Specialists.²

When You Need a Permit

Any new installation, repair, alteration, or extension of a septic system requires an ADH permit. The process runs in three stages. First, the ADH reviews your application and issues a Permit for Construction that authorizes the work to begin. Second, once the installer finishes, the ADH or its Authorized Agent inspects the completed system against the approved design. Third, the ADH issues a Permit for Operation, and only then can you legally use the system.³

Installers must notify the local Authorized Agent at least 24 hours before starting work so the inspection can be coordinated. Beginning construction without a valid Permit for Construction is illegal outside of the emergency-repair exception described below.

Permit fees for new installations scale with the square footage of the structure the system will serve:⁴

1,500 sq ft or less: $30
1,501 to 2,000 sq ft: $45
2,001 to 3,000 sq ft: $90
3,001 to 4,000 sq ft: $120
Over 4,000 sq ft: $150
Alteration or repair: $30 flat, regardless of structure size

Site Evaluation and the Designated Representative

Before you can apply, a licensed Designated Representative must evaluate the property. That evaluation involves digging soil pits to measure depth to the seasonal water table, bedrock, or impervious layers, and documenting topography, water sources, wells, and utilities. The results dictate what type of system the site can support, where components can go, and how large the absorption field must be. If the site can’t handle wastewater properly, no engineering will fix it.³

A Designated Representative must either hold an Arkansas professional license (engineer, master plumber, sanitarian, or land surveyor) or hold a bachelor’s degree with at least 30 credit hours in natural science or math plus three years of hands-on septic design experience.⁵

Setback Distances

Arkansas rules set minimum horizontal distances between septic components and other site features. The ADH can require greater distances when local conditions demand, and any reduction requires a Department-approved waiver.⁶

Public water supply intake (if within one-quarter mile on that body of water): 300 feet
Spring used as public water supply: 300 feet
Private well (domestic water supply): 100 feet
Stream or lake, measured from high-water mark: 100 feet
Sinkhole: 100 feet
Pond on adjacent property, if in the pond watershed: 100 feet
Pond on the same property: 50 feet
Dwelling or building: 10 feet
Property line: 10 feet
Water service line: 10 feet

When a private well and a septic system share a lot, the well must sit at least 100 feet from any part of the wastewater system and at least 50 feet from any lot line. The ADH also weighs soil porosity and well depth when deciding whether the minimums are enough.⁶

Tank Size and Who Can Install

Tank capacity is set by bedroom count, because bedrooms predict peak water use:⁷

One to three bedrooms: 1,000-gallon minimum
Four bedrooms: 2,000-gallon minimum
Each additional bedroom above three: adds 250 gallons

Installation work must be done by an ADH-registered installer, defined under Act 402 as any person or entity that constructs, installs, alters, or repairs septic systems for compensation. Homeowners keep the right to install or repair their own systems, but the work still has to comply with ADH rules and the approved permit design. Septic tank manufacturers must also hold a valid ADH registration to operate or sell tanks in Arkansas.³

Alternative Systems and Monitoring Contracts

When soil, a high water table, or shallow bedrock rules out a conventional gravity system, the ADH may require an alternative treatment system: aerobic treatment units (ATUs), mound systems, or other engineered solutions that treat effluent to a higher standard before it enters the soil. These cost more and carry ongoing obligations.⁶

Owners of ATUs and other alternative systems must keep a monitoring contract with a registered monitoring person for the life of the system. Self-monitoring is not an option. The monitoring person has to be registered with the ADH and authorized by the system’s manufacturer to service that specific unit, and assessments must happen at least every six months. A lapsed contract puts you in violation of state law.⁸

Systems that discharge treated effluent to the surface instead of subsurface absorption face extra requirements, including a minimum lot size of three acres. Surface-discharging systems may also need a separate permit from the Arkansas Division of Environmental Quality, because the discharge falls under National Pollutant Discharge Elimination System (NPDES) jurisdiction.⁶

Routine Maintenance

Pumping the tank every three to five years is the single most important thing an owner can do to extend a system’s life, though the right frequency depends on tank size, household size, and water use. Only a professional holding an Arkansas Septic Tank Cleaner License can pump a tank.⁹

The EPA does not recommend commercial septic additives, whether sold as cleaners, decomposers, deodorizers, or enhancers. Strong acids and alkalis kill the bacteria that do the actual treatment work, chlorinated hydrocarbons and other organic solvents can contaminate groundwater, and hydrogen peroxide has been shown to break down soil structure in the drainfield.¹⁰ Keep wipes (including “flushable” ones), grease, paint, and harsh household chemicals out of the system. If something goes wrong, call a licensed professional or your local Environmental Health Specialist rather than a product off the shelf.

Repairs, Alterations, and Emergencies

Repairs, alterations, and extensions follow the same three-part permit process as new installations, at a flat $30 fee. There is one exception. When a system fails and creates an immediate health hazard, you can begin emergency repairs without waiting for a permit, but you must obtain the permit within ten working days after the repairs are completed. The exception exists because raw sewage surfacing in a yard or backing up into a house cannot wait for paperwork, but the ADH still verifies the work afterward.³

If the ADH determines a system is a health hazard or nuisance, the owner has 30 working days from notification to take corrective action. The clock starts the day notice is received.⁶

Penalties for Violations

Installing a system without a permit, running a failing system without correcting it, or otherwise violating the Sewage Disposal Systems Act or ADH rules is a misdemeanor with a fine of $100 to $1,000 per conviction.¹

Licensed installers, Designated Representatives, monitoring personnel, and septic tank manufacturers who fail to renew within 60 days of their annual expiration owe a late fee equal to half the annual license fee on top of the renewal cost. A failing system that contaminates a neighbor’s well or a nearby waterway can also trigger civil liability separate from the misdemeanor.

Buying or Selling a Home With a Septic System

Arkansas does not require a septic inspection before selling a home, and the state does not require a property condition disclosure from every seller, though most residential deals include one in practice. If you are buying, the burden of inspection is on you.

A pre-purchase inspection typically locates the tank and drainfield, checks the tank for cracks and structural damage, measures sludge and scum, and confirms the drainfield drains. Your local ADH office keeps records of permitted systems and can provide the original design documents, which help an inspector locate components and check the installed system against the approved plan. Unpermitted additions, undersized tanks for homes that later added bedrooms, and drainfields that were never built to specification often surface here.

Financial Help for System Repairs

Two federal programs can offset the cost of replacing a failing system. The USDA’s Single Family Housing Repair program offers low-interest loans up to $40,000 and grants up to $10,000 to remove health and safety hazards, including failing septic systems, with loans and grants combinable up to $50,000. You must own and occupy the home, live in an eligible rural area, and fall within the very-low-income limit; grants are restricted to homeowners 62 or older.¹¹

The EPA’s Clean Water State Revolving Fund also finances decentralized wastewater projects, including septic repair, replacement, upgrade, or new construction. Arkansas administers its own CWSRF program; contact the Arkansas Natural Resources Commission or the ADH for current eligibility and application details.¹²

1
Code of Arkansas Rules. 14 CAR 21-1702 – Penalties
2
Justia Law. Arkansas Code Title 14, Subtitle 14, Chapter 236
3
Arkansas Department of Health. Arkansas Code Rules Pertaining to Onsite Wastewater Systems and Relevant Acts
4
Arkansas Department of Health. Individual Onsite System Permit Application – EHP-19
5
Arkansas Department of Health. Designated Representative License Application Form
6
Arkansas Department of Health. Onsite Wastewater Rule
7
Arkansas Department of Health. Section 1 – Rules
8
Code of Arkansas Rules. 14 CAR 21-1101 – Generally
9
Cornell Law School. Arkansas Code R. 002 – Rules and Regulations Pertaining to General Sanitation
10
U.S. Environmental Protection Agency (EPA). Septic Tank Additives Fact Sheet
11
USDA Rural Development. Single Family Housing Repair Loans and Grants
12
U.S. Environmental Protection Agency (EPA). Clean Water State Revolving Fund (CWSRF) – Decentralized Wastewater Treatment