Marion/s Main St WWTF
Marion, SC · Marion County · Publicly Owned Treatment Works
- Average flow
- 1.06 MGD
- Design flow
- 10 MGD
- NPDES permit
- SC0046230
- Administratively continued
- Permit expires
- May 2024
- Population served
- —
- CWNS 2022
Marion/s Main St WWTF is a publicly owned wastewater treatment works in Marion, Marion County, South Carolina treating an average of 1.06 million gallons per day against a permitted design capacity of 10 MGD. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit SC0046230 (administratively continued), which expires in May 2024, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Marion/s Main St WWTF.
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Nearby wastewater treatment plants in South Carolina
Latta · 12 mi away
0.19 MGD
Nichols · 15 mi away
0.03 MGD
Pamplico · 16 mi away
0.09 MGD
Dillon · 17 mi away
1.46 MGD
Lake View · 18 mi away
—
Florence · 21 mi away
10.19 MGD
Johnsonville · 23 mi away
0.97 MGD
Hemingway · 27 mi away
0.31 MGD
Marion/s Main St WWTF: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated May 25, 2025.