Septic and Sewer Connection Requirements in Georgia

Georgia property owners, developers, and licensed plumbing contractors operate within a dual-track wastewater framework that governs when a structure must connect to a public sewer system and when an on-site septic system is permissible or required. These requirements intersect state environmental regulation, local health authority oversight, and plumbing code standards — with consequences that affect permitting approval, property transfer, and occupancy certification. The Georgia Plumbing Authority's home reference provides broader context for how these systems fit within the state's overall plumbing regulatory structure.

Definition and scope

Septic and sewer connection requirements in Georgia define the legal and technical conditions under which a building's wastewater must be managed — either through connection to a publicly owned treatment works (POTW) or through an on-site sewage management system (OSMS), the regulatory term used by the Georgia Department of Public Health (DPH) for what is commonly called a septic system.

The Georgia DPH, through its Environmental Health section, regulates on-site sewage management systems under Rules of the Georgia Department of Public Health, Chapter 511-3-1. These rules establish soil evaluation criteria, system sizing, setback distances from wells and property lines, and installer certification requirements.

Municipal and county sewer systems operate under permits issued by the Georgia Environmental Protection Division (EPD), a division of the Georgia Department of Natural Resources (DNR), under the framework of the Georgia Water Quality Control Act (O.C.G.A. § 12-5-20 et seq.). EPD administers National Pollutant Discharge Elimination System (NPDES) permits for treatment facilities and sets the discharge standards that determine when sewer expansion is required.

The regulatory context for Georgia plumbing details how the Georgia State Plumbing Code coordinates with these environmental authorities to govern the physical installation of building sewer laterals and septic connections.

Scope limitations: This page addresses Georgia state-level requirements only. Local county health departments may apply more restrictive standards. Federal Clean Water Act provisions (33 U.S.C. § 1251 et seq.) administered by the U.S. Environmental Protection Agency set baseline requirements that supersede state minimums but are not covered in detail here. Requirements specific to industrial pretreatment, grease trap connections, or commercial food service discharges fall outside the core scope of this page.

How it works

The determination of which wastewater pathway applies to a given parcel follows a structured regulatory sequence:

1. Proximity to public sewer — If a public sewer line exists within 200 feet of a property boundary (the threshold applied by most Georgia county health authorities under DPH guidance), connection is typically required for new construction or substantial renovation. Some jurisdictions set this threshold at 100 feet. The applicable distance is defined by the local county health department's implementing ordinance.

2. Soil suitability evaluation — Where sewer connection is not required or feasible, a licensed soil scientist or environmental health specialist conducts a site evaluation. Georgia DPH Rule 511-3-1-.04 governs acceptable soil types, percolation characteristics, and minimum lot size (generally 43,560 square feet — 1 acre — for standard gravity systems on parcels served by a private well).

3. System design and sizing — Approved systems must be sized according to the number of bedrooms or projected daily flow. Residential systems default to 150 gallons per day per bedroom under DPH design standards. A 3-bedroom home therefore requires a system rated for a minimum of 450 gallons per day.

4. Permit issuance — County environmental health offices issue OSMS construction permits. No construction may begin before permit approval. The Georgia DPH operates through 159 county health departments, each serving as the local permitting authority for on-site systems.

5. Installation by certified personnel — Georgia law requires that septic system installation be performed by contractors holding a valid Low Voltage Contractor or Utility Contractor license as applicable, or a septic system contractor registration issued through DPH. Plumbing contractors connecting building sewer laterals must hold the appropriate license class under the Georgia State Licensing Board for Residential and General Contractors or the Georgia State Plumbing Board.

6. Inspection and final approval — County environmental health inspectors conduct site inspections before cover, at completion, and as part of final approval. Plumbing inspections for the building sewer lateral are coordinated with the local building department under the Georgia State Minimum Standard Plumbing Code (the adopted edition of the International Plumbing Code with Georgia amendments).

Common scenarios

New residential construction outside sewer service area: The developer must obtain an OSMS permit from the county health department before a building permit is issued. Soil evaluation, system design, and setback compliance are prerequisites. The building permit is conditioned on the OSMS permit approval.

Existing structure with failing septic system: When a system fails — evidenced by surface ponding, sewage backup, or failed inspection — the property owner must either repair or replace the OSMS, or connect to public sewer if a line is accessible. Continued use of a failed system violates DPH Rule 511-3-1 and can result in an order to vacate.

Infill development in sewer service area: A parcel within a utility's certificated service territory is typically required to connect to the public sewer rather than install a new septic system, regardless of lot size. The utility's connection fee and tap-in charges apply; these vary by jurisdiction and are set by local ordinance.

Property with both a septic system and sewer access: When public sewer is extended to reach a property that previously relied on an OSMS, Georgia counties may issue mandatory connection orders within a defined period — commonly 12 months — after sewer becomes available within the required distance. The abandoned septic tank must be properly decommissioned: pumped, inspected, and either filled with sand or crushed in place per county health department standards.

Commercial or multi-family development: Flows exceeding 1,500 gallons per day typically require EPD review and may trigger NPDES permitting or sewer extension requirements regardless of proximity thresholds. Commercial plumbing standards in Georgia address additional sizing and code compliance considerations for these project types.

Decision boundaries

The central regulatory distinction in Georgia's wastewater framework separates public sewer connection from on-site sewage management, with a secondary distinction between conventional gravity systems and alternative or experimental systems.

Alternative systems — including low-pressure pipe, drip irrigation, mound systems, and aerobic treatment units — are approved on a case-by-case basis when conventional gravity systems cannot meet soil or setback criteria. Georgia DPH Rule 511-3-1-.07 governs experimental and alternative system approvals. These systems require engineered design and carry additional maintenance and monitoring obligations.

The Georgia plumbing permit application process and Georgia plumbing inspection process pages address the procedural steps that govern how these connections move through the local building and health authority review workflow.

Violations of OSMS permitting or installation requirements fall under the enforcement authority of county environmental health departments and, where water quality is affected, EPD. Penalties under the Georgia Water Quality Control Act can reach $25,000 per day per violation (O.C.G.A. § 12-5-53). Plumbing code violations are addressed separately through the building department and state licensing board channels described in Georgia plumbing violations and penalties.

References

• Georgia Department of Public Health — Environmental Health, Onsite Sewage Management
• Georgia DPH Rules Chapter 511-3-1 — On-Site Sewage Management Systems
• Georgia Environmental Protection Division — Water Quality
• Georgia Water Quality Control Act, O.C.G.A. § 12-5-20 et seq.
• O.C.G.A. § 12-5-53 — Penalties under Georgia Water Quality Control Act
• U.S. Environmental Protection Agency — National Pollutant Discharge Elimination System (NPDES)
• Georgia Department of Natural Resources — Environmental Protection Division
• International Plumbing Code (ICC)
• Georgia Secretary of State — State Licensing Board for Residential and General Contractors