Twelve Mile Creek WWTP
Waxhaw, NC · Union County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 6 MGD
- NPDES permit
- NC0085359
- Administratively continued
- Permit expires
- December 2025
- Population served
- 53,220
- CWNS 2022
Twelve Mile Creek WWTP is a publicly owned wastewater treatment works in Waxhaw, Union County, North Carolina, serving about 53,220 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches, biogas silos, biogas balloons. It discharges under NPDES permit NC0085359 (administratively continued), which expires in December 2025, with 1 recorded violation 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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Carrousels / oxidation ditches
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Biogas silos
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Biogas balloons
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Compliance snapshot (last 3 years)
- Total violations
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
4 verified contacts for Twelve Mile Creek WWTP, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Twelve Mile Creek WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in North Carolina
Charlotte · 19 mi away
10.99 MGD
Monroe · 19 mi away
—
Unionville · 20 mi away
1.25 MGD
Cramerton · 26 mi away
0.53 MGD
Mount Holly · 27 mi away
—
Oakboro · 34 mi away
0.54 MGD
Mooresville · 40 mi away
—
Norwood · 41 mi away
—
Twelve Mile Creek 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 6, 2025.