Sullivans Island WWTF
Sullivans Island, SC · Charleston County · Publicly Owned Treatment Works
- Average flow
- 0.38 MGD
- Design flow
- 0.57 MGD
- NPDES permit
- SC0020052
- Administratively continued
- Permit expires
- December 2023
- Population served
- —
- CWNS 2022
Sullivans Island WWTF is a publicly owned wastewater treatment works in Sullivans Island, Charleston County, South Carolina treating an average of 0.38 million gallons per day against a permitted design capacity of 0.57 MGD. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit SC0020052 (administratively continued), which expires in December 2023, 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 Sullivans Island WWTF.
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Mount Pleasant · 3 mi away
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Isle Of Palms · 3 mi away
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Charleston · 6 mi away
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Charleston · 7 mi away
—
North Charleston · 8 mi away
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Goose Creek · 15 mi away
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Dorchester · 19 mi away
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Summerville · 27 mi away
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Sullivans Island 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 August 3, 2026.