South Island Psd WWTP
Hilton Head, SC · Beaufort County · Publicly Owned Treatment Works
- Average flow
- 0.75 MGD
- Design flow
- —
- NPDES permit
- SC0042501
- Effective
- Permit expires
- January 2029
- Population served
- —
- CWNS 2022
South Island Psd WWTP is a publicly owned wastewater treatment works in Hilton Head, Beaufort County, South Carolina treating an average of 0.75 million gallons per day. Treatment on site includes clarifiers, aerated lagoons. It discharges under NPDES permit SC0042501 (effective), which expires in January 2029, 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 South Island Psd WWTP.
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Nearby wastewater treatment plants in South Carolina
Hilton Head Island · 7 mi away
2.88 MGD
Ridgeland · 17 mi away
7.12 MGD
Port Royal · 18 mi away
4.44 MGD
Hardeeville · 22 mi away
0.66 MGD
Ridgeland · 26 mi away
—
Beaufort · 29 mi away
0.0016 MGD
Edisto Island · 35 mi away
0.16 MGD
Yemassee · 39 mi away
0.12 MGD
South Island Psd WWTP: 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 March 7, 2025.