Triangle WWTP
Durham, NC · Durham County · Publicly Owned Treatment Works
- Average flow
- 4.35 MGD
- Design flow
- 12 MGD
- NPDES permit
- NC0026051
- Effective
- Permit expires
- April 2027
- Population served
- 15,321
- CWNS 2022
Triangle WWTP is a publicly owned wastewater treatment works in Durham, Durham County, North Carolina treating an average of 4.35 million gallons per day against a permitted design capacity of 12 MGD, serving about 15,321 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit NC0026051 (effective), which expires in April 2027, with 3 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
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
43 verified contacts for Triangle WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Triangle WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in North Carolina
Cary · 7 mi away
5.91 MGD
Chapel Hill · 7 mi away
4.48 MGD
Apex · 12 mi away
—
Holly Springs · 16 mi away
—
Hillsborough · 17 mi away
0.89 MGD
Apex · 18 mi away
5.1 MGD
Butner · 18 mi away
1.36 MGD
Fuquay Varina · 19 mi away
0.07 MGD
Triangle 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 January 23, 2025.