Concord Wastewater Treatment Facility
Concord, MA · Middlesex County · Publicly Owned Treatment Works
- Average flow
- 0.68 MGD
- Design flow
- —
- NPDES permit
- MAG590030
- Effective
- Permit expires
- October 2027
- Population served
- 5,492
- CWNS 2022
Concord Wastewater Treatment Facility is a publicly owned wastewater treatment works in Concord, Middlesex County, Massachusetts treating an average of 0.68 million gallons per day, serving about 5,492 residents. Treatment on site includes clarifiers, uncovered lagoons, attached growth, aerobic, biosolids thickening, chemical addition, alum and other unit processes. It discharges under NPDES permit MAG590030 (effective), which expires in October 2027, with 5 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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Attached Growth, Aerobic
unit processBiosolids Thickening
unit processChemical Addition, Alum
unit processChemical Addition, Polymer
unit processChemical P Removal
unit processDisinfection, UV
unit processPrimary Clarification or Sedimentation
unit processScreening
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Compliance snapshot (last 3 years)
- Total violations
- 5
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
28 verified contacts for Concord Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 28 verified contacts (25 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Concord Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Wayland · 7 mi away
0.03 MGD
Billerica · 9 mi away
2.88 MGD
Marlborough · 11 mi away
2.04 MGD
Hudson · 11 mi away
0.78 MGD
Marlborough · 17 mi away
1.16 MGD
North Andover · 20 mi away
21.7 MGD
Westborough · 20 mi away
4.17 MGD
Winthrop · 21 mi away
233.7 MGD
Concord Wastewater Treatment Facility: 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 November 28, 2025.