Billerica Wastewater Treatment Facility
Billerica, MA · Middlesex County · Publicly Owned Treatment Works
- Average flow
- 2.88 MGD
- Design flow
- 5.5 MGD
- NPDES permit
- MA0101711
- Effective
- Permit expires
- February 2029
- Population served
- 35,443
- CWNS 2022
Billerica Wastewater Treatment Facility is a publicly owned wastewater treatment works in Billerica, Middlesex County, Massachusetts treating an average of 2.88 million gallons per day against a permitted design capacity of 5.5 MGD, serving about 35,443 residents. Treatment on site includes clarifiers, biological n removal, biological p removal, biological treatment, other, biosolids mechanical dewatering and other unit processes. It discharges under NPDES permit MA0101711 (effective), which expires in February 2029, with 52 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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Biological N removal
unit processBiological P removal
unit processBiological Treatment, Other
unit processBiosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processChemical Addition, Alum
unit processChemical Addition, Polymer
unit processChemical P Removal
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 52
- Effluent violations
- 21
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
17 verified contacts for Billerica Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 17 verified contacts (14 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Billerica Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Concord · 9 mi away
0.68 MGD
North Andover · 11 mi away
21.7 MGD
Haverhill · 16 mi away
6.58 MGD
Wayland · 17 mi away
0.03 MGD
Hudson · 19 mi away
0.78 MGD
Marlborough · 20 mi away
2.04 MGD
Salem · 21 mi away
17.57 MGD
Merrimac · 22 mi away
0.28 MGD
Billerica 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 May 19, 2025.