Mount Holly WWTP
Mount Holly, NC · Gaston County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 4 MGD
- NPDES permit
- NC0021156
- Terminated
- Permit expires
- February 2029
- Population served
- 44,993
- CWNS 2022
Mount Holly WWTP is a publicly owned wastewater treatment works in Mount Holly, Gaston County, North Carolina, serving about 44,993 residents. Treatment on site includes clarifiers, aerated lagoons, uncovered lagoons. It discharges under NPDES permit NC0021156 (terminated), which expires in February 2029, with 2 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
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mount Holly WWTP.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in North Carolina
Cramerton · 4 mi away
0.53 MGD
Charlotte · 8 mi away
10.99 MGD
Lincolnton · 18 mi away
—
Mooresville · 21 mi away
—
Waxhaw · 27 mi away
—
Monroe · 31 mi away
—
Unionville · 36 mi away
1.25 MGD
Oakboro · 42 mi away
0.54 MGD
Mount Holly 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 April 24, 2025.