Siler City WWTP
Siler City, NC · Chatham County · Publicly Owned Treatment Works
- Average flow
- 2.1 MGD
- Design flow
- 4 MGD
- NPDES permit
- NC0026441
- Effective
- Permit expires
- May 2027
- Population served
- 8,389
- CWNS 2022
Siler City WWTP is a publicly owned wastewater treatment works in Siler City, Chatham County, North Carolina treating an average of 2.1 million gallons per day against a permitted design capacity of 4 MGD, serving about 8,389 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit NC0026441 (effective), which expires in May 2027, with 21 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Uncovered lagoons
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Carrousels / oxidation ditches
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Compliance snapshot (last 3 years)
- Total violations
- 21
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
5 verified contacts for Siler City WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Siler City WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in North Carolina
Pittsboro · 14 mi away
0.06 MGD
Graham · 22 mi away
1.9 MGD
Chapel Hill · 25 mi away
4.48 MGD
Hillsborough · 30 mi away
0.89 MGD
Durham · 32 mi away
4.35 MGD
Holly Springs · 33 mi away
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Apex · 33 mi away
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Biscoe · 33 mi away
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Siler City 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 May 20, 2025.