What is the address of Triangle WWTP?

The address on the plant’s EPA facility record is 5926 Nc Highway 55 East, Durham, NC 27713, in Durham County. Its coordinates are 35.8795, -78.8953. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Triangle WWTP treat?

Triangle WWTP treats an average of 4.53 MGD and is permitted for a design flow of 12 MGD.

Has Triangle WWTP been subject to EPA enforcement action?

EPA's enforcement records list 1 formal civil enforcement case naming Triangle WWTP, 0 since fiscal year 2020. The latest case reached its current status in January 2007 (administrative order, final order with penalty). Penalties assessed across the cases total $2,300. The full case history, with milestones, violation types and EPA's case summaries, is shown in Klarifi with a free account.

What treatment technology does Triangle WWTP use?

Klarifi has identified 3 treatment structures and unit processes at the Durham facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Triangle WWTP?

The facility discharges under NPDES permit NC0026051, currently effective, expiring April 2027.

Is Triangle WWTP in compliance?

Discharge monitoring reports show 3 violations at Triangle WWTP in the last three years, 3 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Triangle WWTP and how do I contact them?

Triangle WWTP is a publicly owned treatment works in Durham, North Carolina. Klarifi lists 43 verified decision-maker contacts for this facility, available with a free trial.

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Triangle WWTP

5926 Nc Highway 55 East, Durham, NC 27713 · Durham County · Publicly Owned Treatment Works

Average flow: 4.53 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 4.53 million gallons per day against a permitted design capacity of 12 MGD, serving about 15,321 residents. It discharges under NPDES permit NC0026051 (effective), which expires in April 2027, with 3 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in January 2007.

Treatment technology

3 treatment structures and unit processes identified at Triangle WWTP.

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See the full treatment train at Triangle WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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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.

EPA enforcement history

Federal civil enforcement cases, compliance inspections and informal actions recorded for Triangle WWTP in EPA's ICIS system.

Formal actions: 1; 0 since FY2020

Penalties assessed: $2,300; all cases

EPA inspections: 0; none on record

Latest case · Jan 2007

County of Durham, N.C./Triangle WWTP

Administrative order · CWA, Sewage Sludge Disposal · Final Order With Penalty · Penalty $2,300

EPA's description of the case:

“CAFO issued 7/1/2004, assessing a penalty of $2,300. Respondent should have at least monitored once per 60 days or six times a year for inorganic pollutants, and vector attraction reduction.…”

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Source: EPA ECHO, civil enforcement case 04-2004-4505.

Full case history with a free Klarifi account

Every action against Triangle WWTP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.

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Key contacts

43 verified contacts for Triangle WWTP, with validated emails and direct phone numbers.

Unlock 43 verified contacts (40 more than shown)

Names, validated emails and direct phone numbers for decision-makers at Triangle WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in North Carolina

Town Of Cary - North Cary WWTP

Cary · 7 mi away

6.11 MGD

Mason Farm WWTP

Chapel Hill · 7 mi away

4.86 MGD

North Durham WRF

Durham · 10 mi away

8.9 MGD

Apex Water Reclamation Facility

Apex · 12 mi away

—

Holly Springs WWTP

Holly Springs · 16 mi away

—

Hillsborough WWTP Town Of

Hillsborough · 17 mi away

1.01 MGD

Town Of Cary - South Cary WWTP

Apex · 18 mi away

5.96 MGD

Sgwasa WWTP

Butner · 18 mi away

1.38 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 October 26, 2026; facility record last updated January 23, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Centrate · Ozonation · all terms

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