Elmwood WTP
Marlton, NJ · Burlington County · Publicly Owned Treatment Works
- Average flow
- 1.73 MGD
- Design flow
- 1.5 MGD
- NPDES permit
- NJ0024040
- Effective
- Permit expires
- June 2031
- Population served
- 24,329
- CWNS 2022
Elmwood WTP is a publicly owned wastewater treatment plant in Marlton, Burlington County, New Jersey treating an average of 1.73 million gallons per day against a permitted design capacity of 1.5 MGD, serving about 24,329 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit NJ0024040 (effective), which expires in June 2031, with 20 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
- 20
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Elmwood WTP.
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Nearby wastewater treatment plants in New Jersey
Medford Lakes · 4 mi away
0.27 MGD
Maple Shade · 8 mi away
1.71 MGD
Willingboro · 10 mi away
3 MGD
Palmyra · 11 mi away
0.37 MGD
Riverton · 11 mi away
0.12 MGD
Pemberton · 11 mi away
1.45 MGD
Cinnaminson · 11 mi away
1.28 MGD
Delran · 11 mi away
1.87 MGD
Elmwood WTP: 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 21, 2025.