Georgia Wastewater Treatment Plants

1. Introduction: Georgia’s Water Reclamation Landscape

Georgia’s wastewater infrastructure is defined by a unique combination of rapid metropolitan growth, strict regulatory requirements due to interstate water sharing (the Tri-State Water Wars), and a diverse geography ranging from the Appalachian foothills to the Atlantic coast. The state manages a robust network of over 300 major municipal wastewater treatment facilities, serving a population of approximately 11 million residents.

The regulatory environment is overseen by the Georgia Environmental Protection Division (GA EPD). Because the Metro Atlanta area sits atop a continental divide with limited natural water supply, the region has become a national leader in water reclamation and reuse. Facilities like Gwinnett County’s F. Wayne Hill Water Resources Center operate with some of the strictest effluent limits in the United States, returning highly treated water to Lake Lanier.

Current challenges include managing aging combined sewer systems (CSO) in historic urban centers, addressing nutrient loads to protect downstream waterways, and expanding capacity in the rapidly growing suburbs of Atlanta and Savannah. With billions allocated via GEFA (Georgia Environmental Finance Authority) and federal IIJA funding, the state is currently in a high-activity phase of capital improvement.

Georgia repays close study for one structural reason: it is the rare large state whose principal metropolitan area sits at the top of its watersheds rather than the bottom. Atlanta has no large river flowing into it, which converts water reclamation from an environmental obligation into a supply strategy and explains why treatment standards here run ahead of federal requirements. Readers benchmarking the state against comparable systems can work from the national inventory of US wastewater treatment plants to see how Georgia’s capacity, permit conditions, and reuse practice compare with regional and national norms.

2. Recent Developments & Market Trends

In the last 24 months, Georgia has seen a significant shift toward resilience and advanced treatment technologies. Key developments impacting the engineering and vendor market include:

• The Water Tower Innovation Hub: Located in Buford, GA, this is a newly operational global innovation hub for water/wastewater technologies, fostering R&D and pilot testing for new treatment processes.
• DeKalb County Consent Decree: A massive, multi-year overhaul of the sewer system is ongoing, with hundreds of millions committed to spill reduction and capacity management.
• Indirect Potable Reuse (IPR): Georgia is advancing IPR regulations and projects, particularly in the Chattahoochee River basin, to secure long-term water supply.
• GEFA Funding Surge: The Georgia Environmental Finance Authority has been aggressive in distributing SRF and grant loans, with a specific focus on energy neutrality and biosolids optimization.

3. Top 20 Largest Wastewater Treatment Plants in Georgia

The following table ranks the largest wastewater treatment facilities in Georgia by design capacity. This data is aggregated from GA EPD permits, municipal capital improvement plans, and facility annual reports.

Note: Capacities listed represent permitted design flow. Peak wet weather flows may be significantly higher.

Reading the table. Rows are sorted by permitted design flow descending; the James E. Quarles plant appears last because no capacity figure was available, not because it is the smallest. Note also that the Fowler WRF expansion described in Section 4 references a 2.5 to 7.5 MGD phase while the table carries a 10.0 MGD figure for the same facility. That kind of divergence between permitted, current, and phased-buildout capacity is routine in Georgia because so many suburban plants are mid-expansion, and it is why any figure headed into a specification should be traced to the facility’s NPDES permit rather than to a planning document.

Detailed Profiles: Largest Facilities

1. R.M. Clayton Water Reclamation Center

The R.M. Clayton Water Pollution Control Plant is the largest wastewater facility in the southeastern United States and the anchor of the City of Atlanta system.

• Location: Atlanta, Fulton County
• Design Capacity: 122 MGD (Peak hydraulic capacity >240 MGD)
• Operating Authority: City of Atlanta Department of Watershed Management
• Receiving Water: Chattahoochee River
• Treatment Process: Advanced secondary treatment involving coarse screening, grit removal, primary clarification, activated sludge, and UV disinfection. It is the largest plant in the Southeast US.
• Infrastructure Highlights: The facility handles flows from a combined sewer area, necessitating massive headworks infrastructure. Recent projects focus on grit removal efficiency and odor control systems to accommodate nearby residential growth.
• Compliance: Operates under strict NPDES permits due to discharge into the Chattahoochee, a primary drinking water source for downstream users.

2. F. Wayne Hill Water Resources Center

The Gwinnett County F. Wayne Hill Water Resources Center in Buford is the most advanced treatment facility in Georgia and one of the most advanced in the country, built specifically to return water to the region’s drinking supply.

• Location: Buford, Gwinnett County
• Design Capacity: 60 MGD
• Operating Authority: Gwinnett County Department of Water Resources
• Receiving Water: Lake Lanier (Direct discharge)
• Treatment Process: One of the most advanced plants in the nation. Uses chemical clarification, ozonation, Granular Activated Carbon (GAC), and ultrafiltration membranes.
• Infrastructure Highlights: Features a world-class Nutrient Recovery system (WASSTRIP® and OSTARA® Pearl® process) to recover phosphorus as fertilizer. The plant returns incredibly high-quality water to Lake Lanier, the metro area’s main reservoir.

3. South River Water Reclamation Center

Coverage of the South River Water Reclamation Facility addresses the third-largest plant in the state and one of the more complex jurisdictionally, sitting on the Fulton-DeKalb county line.

• Location: Atlanta, Fulton/DeKalb County line
• Design Capacity: 54 MGD
• Operating Authority: City of Atlanta
• Receiving Water: South River
• Treatment Process: Uses biological nutrient removal (BNR) to meet strict phosphorus limits.
• Recent Upgrades: The facility has undergone significant upgrades to its solids handling capabilities and UV disinfection systems to replace gaseous chlorine.

4. J.B. Messerly Water Pollution Control Plant

The Augusta Wastewater Treatment Plant, operating as the J.B. Messerly facility, is the largest treatment operation outside metro Atlanta and the state’s principal discharge to the Savannah River.

• Location: Augusta, Richmond County
• Design Capacity: 46 MGD
• Operating Authority: Augusta Utilities Department
• Receiving Water: Savannah River
• Infrastructure Highlights: This plant is unique for its constructed wetlands usage for polishing and its large industrial load handling capabilities. It serves the consolidated government of Augusta-Richmond County.

5. Utoy Creek Water Reclamation Center

The City of Atlanta Utoy Creek Water Reclamation Center is the second of Atlanta’s three water reclamation centers and serves the southwestern quadrant of the city.

• Location: Atlanta, Fulton County
• Design Capacity: 44 MGD
• Operating Authority: City of Atlanta Department of Watershed Management
• Receiving Water: Chattahoochee River, via Utoy Creek
• Treatment Process: Activated sludge secondary treatment with nutrient removal and disinfection, discharging into the same Chattahoochee reach that supplies downstream drinking water intakes.
• Infrastructure Highlights: Utoy Creek shares the City of Atlanta biosolids program with R.M. Clayton, and the two facilities are being addressed together in the department’s multi-year digester and dryer rehabilitation plan.

6. South Columbus Water Resources Facility

• Location: Columbus, Muscogee County
• Design Capacity: 42 MGD
• Operating Authority: Columbus Water Works
• Receiving Water: Chattahoochee River
• Treatment Process: A key facility in the “CSO Control Plan” for Columbus, utilizing advanced separation technologies to manage wet weather flows effectively.
• Energy: Notable for its bioconversion programs and energy recovery initiatives.

4. Plants with Approved Budgets & Expansion Projects

Georgia’s water sector represents a massive market for engineering services and equipment, driven by population growth and consent decree compliance.

A. Major Projects Under Construction (2024-2026)

B. Projects in Design/Planning Phase (2025-2027)

• Shoal Creek WRF Expansion (Clayton County): Planning underway to expand capacity and rehabilitate the constructed wetlands system. Estimated budget: $45M.
• City of Atlanta Biosolids Management Plan: Long-term CIP focusing on digester rehabilitation and dryer improvements across R.M. Clayton and Utoy Creek. Budget: Multi-year $100M+ allocation.
• Savannah President Street Plant Upgrade: Design phase for electrical and structural hardening against storm surge and sea-level rise.

Summary Statistics

• Total Active Capital Investment: >$1.2 Billion (Statewide)
• Primary Drivers: Capacity (Suburban), Consent Decree/Rehab (Urban Core)
• Key Funding Sources: GEFA SRF Loans (45%), Revenue Bonds (40%), WIFIA/Grants (15%)

5. Regulatory & Compliance Landscape

Engineers operating in Georgia must navigate the Georgia Environmental Protection Division (EPD) regulations, which are heavily influenced by the tri-state water dispute between Alabama, Florida, and Georgia.

• Phosphorus Limits: Extremely strict limits (often < 0.1 mg/L) exist for plants discharging into the Lake Lanier watershed.
• Water Stewardship Act: Requires strict water loss auditing and reporting for all utilities serving >3,300 people.
• PFAS Monitoring: GA EPD has initiated phases of PFAS monitoring in drinking water and is moving toward wastewater effluent monitoring, likely leading to future treatment requirements.

Interstate Context

The tri-state dispute is not background to Georgia’s permit conditions; it is the reason several of them exist. The Apalachicola-Chattahoochee-Flint and Alabama-Coosa-Tallapoosa basins both originate in north Georgia and flow outward, which means metro Atlanta’s withdrawals and discharges determine downstream conditions in two other states. Alabama sits on the receiving end of both systems, and the litigation over Lake Lanier storage allocation has shaped how aggressively Georgia utilities pursue reclamation and return flow credit. That in turn explains why a facility like F. Wayne Hill was built to drinking-water standards: returning treated water to Lanier is a supply argument as much as an environmental one.

Downstream on the ACF, Florida pressed the freshwater flow case on behalf of Apalachicola Bay, and while the Supreme Court resolved that action, the underlying flow sensitivity continues to inform basin planning. On Georgia’s eastern edge, the Savannah River forms the boundary with South Carolina, and both the Augusta and Savannah facilities discharge into a reach whose water quality is a joint product of the two states’ permit programs. Engineers modeling compliance scenarios anywhere along that corridor should treat the South Carolina side as a variable rather than fixed background.

6. Infrastructure Challenges & Opportunities

Combined Sewer Overflows (CSOs): Atlanta and Columbus manage legacy combined systems. Opportunities exist for tunneling, rapid treatment technologies, and green infrastructure design.

Biosolids Disposal: Land application is becoming more restricted due to odor complaints and emerging contaminant concerns. This is driving a market for advanced dewatering, thermal drying, and pyrolysis/gasification technologies.

Workforce: A severe shortage of Class I and II operators is driving automation and SCADA upgrades across the state.

Headwater Position: The structural constraint underneath most of Georgia’s other challenges is that metro Atlanta sits near the top of its watersheds. There is no large river to draw from and no large river to dilute into, which raises the effective cost of every gallon treated: effluent limits are tighter than dilution-based math would require, and reuse is worth more than it would be in a downstream city. For vendors, this makes Georgia an unusually receptive market for advanced treatment that would be difficult to justify economically in states with abundant assimilative capacity.

7. Technology Trends in Georgia

• Membrane Bioreactors (MBR): Becoming the standard for expansions in North Georgia (Forsyth, Gwinnett, Cherokee) where land is expensive and effluent standards are high.
• Constructed Wetlands: Clayton County Water Authority is a global pioneer in using constructed wetlands for indirect potable reuse, a trend that continues to be optimized.
• Nutrient Recovery: Technologies like Ostara (struvite recovery) are operational at F. Wayne Hill, turning phosphorus nuisance into marketable fertilizer.
• Ozone and GAC Polishing: Advanced oxidation followed by granular activated carbon is established practice at the Lake Lanier discharge facilities and is the likely template for any future PFAS-driven effluent requirements.

8. Georgia Treatment Plant Directory

The sections below index the Georgia facilities covered in detail on this site, organized by region. Each entry summarizes the plant’s service area, receiving water, and the regulatory pressure shaping its capital program.

City of Atlanta

The Department of Watershed Management operates three water reclamation centers plus the CSO control facilities inherited from the city’s combined sewer legacy. Atlanta’s long-running federal consent decree drove roughly two decades of tunnel, storage, and separation work, and the department’s current capital emphasis has shifted from overflow control toward biosolids handling and asset renewal at the plants themselves.

Atlanta System Overview

Coverage of the Atlanta wastewater treatment plant system addresses the questions that only make sense at the utility level: how flow is allocated across the three reclamation centers, how the consent decree reshaped the collection system, and how the department sequences capital across facilities rather than plant by plant. For vendors and design partners approaching Atlanta, the system view matters more than any single facility.

R.M. Clayton Water Reclamation Center

Profiled in detail above as the largest facility in the Southeast. Additional operating and capital detail is available in the facility-level profile of the City of Atlanta R.M. Clayton Water Reclamation Center, which covers the reclamation-center framing, the headworks and grit systems that handle combined sewer flow, and the odor control program driven by residential development along the Chattahoochee corridor.

DeKalb and Cobb Counties

The two largest suburban counties in metro Atlanta run their own systems on very different trajectories. DeKalb is working through a federal consent decree that has consumed its capital program for years, while Cobb has been expanding and modernizing against growth rather than enforcement.

Snapfinger Creek Water Pollution Control Plant

The DeKalb County Snapfinger Creek Water Pollution Control Plant is the county’s primary treatment facility at 36 MGD, currently expanding to 54 MGD under a $220 million program combining membrane bioreactors with deep bed filtration. The expansion is consent decree work as much as growth work: added capacity is the mechanism for eliminating the sanitary sewer overflows that triggered the decree, which is why the schedule is externally enforced rather than driven by the county’s own planning cycle.

South Cobb Water Reclamation Facility

The Cobb County South Cobb Water Reclamation Facility in Austell treats 40 MGD and discharges to the Chattahoochee, sharing the top of Cobb County Water System’s portfolio with the R.L. Sutton facility in Marietta. Discharging into the same reach that supplies downstream drinking water intakes places it under the tighter end of Georgia’s nutrient and disinfection expectations, and the county has invested accordingly in process reliability.

The North Georgia Reuse Corridor

The counties north and south of Atlanta have built the most concentrated cluster of indirect potable reuse in the country, and for a reason specific to geography rather than ideology. Gwinnett, Forsyth, and Clayton counties all sit in watersheds where the water they discharge is the water somebody downstream drinks, sometimes within the same county. Treating to reuse standards is therefore the cheapest available way to expand supply, and it has produced a set of facilities that operate well beyond what their NPDES permits alone would require.

Gwinnett County Department of Water Resources anchors the corridor with F. Wayne Hill, profiled above, alongside the Yellow River and Crooked Creek facilities serving the southern half of the county. Forsyth County’s Fowler facility applies the same logic at smaller scale, using membrane bioreactor treatment specifically because its effluent reaches Lake Lanier. Clayton County Water Authority approaches the problem from a different direction entirely, routing treated effluent through constructed wetlands before it reaches the reservoirs that supply the county, an approach that has drawn study delegations from utilities worldwide.

For vendors, this corridor is where advanced treatment sells on economics rather than compliance. Ozone, granular activated carbon, ultrafiltration, and nutrient recovery all have operating references within a thirty-mile radius, which lowers the perceived risk of specifying them and makes north Georgia a practical proving ground for technologies that are harder to justify in high-dilution markets. Dedicated profile pages for the Yellow River, Crooked Creek, and Clayton County facilities do not yet exist on this site.

Coastal and Regional Georgia

Outside the metro area, Georgia’s facilities serve smaller populations but face constraints the Atlanta plants do not: coastal storm exposure in Savannah, heavy industrial loading in Augusta, and combined sewer legacies in the older Fall Line cities.

President Street Wastewater Treatment Plant

The City of Savannah President Street Wastewater Treatment Plant treats 27 MGD and discharges to the Savannah River near the port. Its low elevation and proximity to tidal water make storm surge and sea level rise the defining capital drivers, and the facility is currently in design for electrical and structural hardening. Coastal Georgia facilities also contend with saltwater intrusion in the collection system during high-tide events, a problem inland plants never encounter.

Northside Water Reclamation Plant

The Northside Water Reclamation Plant profile covers a facility operating on the water reclamation model that has become standard across north Georgia, where effluent quality requirements are driven by proximity to water supply reservoirs rather than by dilution capacity. Facilities in this category typically carry tighter phosphorus and nitrogen limits than their size alone would suggest.

9. Resources for Engineers & Operators

• Georgia Association of Water Professionals (GAWP): The primary body for training, conferences, and networking.
• Georgia Environmental Finance Authority (GEFA): The hub for SRF loans and water infrastructure financing.
• Georgia EPD Watershed Protection Branch: For permitting and regulatory guidance.
• The Water Tower: A non-profit innovation center in Gwinnett County providing R&D and training.
• GA EPD Permit Search and Compliance Records: Public access to NPDES permit conditions, monitoring data, and compliance history by facility. The starting point for verifying any capacity or discharge figure.
• EPA ECHO (Enforcement and Compliance History Online): Federal facility-level records, including discharge monitoring report data and consent decree status.
• GEFA Intended Use Plan and Project Priority List: The annual SRF funding priority list, published ahead of each cycle. The clearest forward indicator of where design and construction work will appear.
• Metropolitan North Georgia Water Planning District: Regional water supply, wastewater, and stormwater plans covering the 15-county Atlanta area, which set the capacity assumptions individual utilities plan against.

10. Frequently Asked Questions

What is the largest wastewater treatment plant in Georgia?

The R.M. Clayton Water Reclamation Center in Atlanta is the largest, with a permitted design capacity of 122 MGD.

Who regulates wastewater treatment in Georgia?

The Georgia Environmental Protection Division (GA EPD), specifically the Watershed Protection Branch, issues NPDES permits and enforces compliance.

How is Georgia funding wastewater projects?

Funding primarily comes from the Clean Water State Revolving Fund (CWSRF) administered by GEFA, municipal revenue bonds, and WIFIA federal loans.

Are there water reuse projects in Georgia?

Yes. Clayton County utilizes constructed wetlands for indirect potable reuse, and Gwinnett County returns highly treated effluent to Lake Lanier, which serves as the region’s drinking water reservoir.

What are the operator certification levels in Georgia?

Georgia classifies operators from Class IV (entry-level) to Class I (highest level). Licenses are managed by the Georgia Secretary of State Professional Licensing Boards.

Why does Georgia treat wastewater to drinking water standards in some places?

Because metro Atlanta sits near the headwaters of its river systems and has limited natural supply. Returning highly treated effluent to Lake Lanier and the Chattahoochee is a water supply strategy, not only an environmental one, and it also strengthens Georgia’s position in the interstate allocation disputes by demonstrating return flow. The F. Wayne Hill facility is the clearest example: ozonation, granular activated carbon, and ultrafiltration produce water clean enough to discharge directly into the region’s drinking water reservoir.

How do I verify capacity and compliance data for a specific Georgia plant?

Start with the facility’s NPDES permit through GA EPD’s permit records, which state permitted flow and effluent limits directly, then cross-check actual performance through discharge monitoring report data on EPA ECHO. Design capacity figures published in capital improvement plans frequently differ from permitted flow, particularly at the suburban facilities in the middle of phased expansions, so any number headed into a specification or funding application should be traced back to the permit.

11. Conclusion

Georgia’s wastewater sector combines the technical ambition of a water-scarce region with the capital pressure of one of the fastest-growing metropolitan areas in the country. The result is a market where facilities routinely treat beyond regulatory minimums because the treated water itself has supply value, and where the interstate legal context reaches into individual permit conditions in ways that few other states experience.

For engineers, operators, and vendors, the practical starting point is identifying whether a given facility is driven by consent decree compliance, suburban capacity growth, or reservoir-adjacent effluent quality, since each brings a different technology set, a different funding path, and a different set of qualified competitors. The facility directory above indexes the utilities where that work is concentrated, and the GEFA priority list is the best forward indicator of which of them will be bidding work next.