Greater Lawrence Wastewater Treatment Facility
North Andover, MA · Essex County · Publicly Owned Treatment Works
- Average flow
- 21.7 MGD
- Design flow
- —
- NPDES permit
- MAL100447
- Effective
- Permit expires
- December 2030
- Population served
- 412,411
- CWNS 2022
Greater Lawrence Wastewater Treatment Facility is a publicly owned wastewater treatment works in North Andover, Essex County, Massachusetts treating an average of 21.7 million gallons per day, serving about 412,411 residents. Treatment on site includes clarifiers, biogas silos, biological p removal, biosolids anaerobic digestion with energy recovery, biosolids chemical addition and other unit processes. It discharges under NPDES permit MAL100447 (effective), which expires in December 2030, with 10 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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Biogas silos
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Biological P removal
unit processBiosolids Anaerobic Digestion with Energy Recovery
unit processBiosolids Chemical Addition
unit processBiosolids Drying
unit processBiosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processChemical Addition, Ferric Chloride
unit processChemical P Removal
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processFlow Equalization
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processSuspended Growth, Aerobic
unit processSuspended Growth, Anaerobic
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 10
- Effluent violations
- 10
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Capital improvement projects in North Andover
North Andover's capital improvement plan lists 16 water, sewer and wastewater line items worth $22M starting 2026–2029. The largest budgeted items are shown here.
All water and sewer capital projects in North Andover →
| Project | Budget | Years |
|---|---|---|
| Improvements to Water Treatment Plant | $5,950,000 | 2026–2030 |
| Water Billing Software/Meter Upgrades & Replacement | $4,500,000 | 2027–2030 |
| Sewer Pump Station Improvements | $1,900,000 | 2026–2030 |
| Water Main Replacement | $1,800,000 | 2027–2030 |
| Improvements to Various Water Booster Stations/Water | $1,800,000 | 2026–2026 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
2 verified contacts for Greater Lawrence Wastewater Treatment Facility, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Greater Lawrence Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Haverhill · 5 mi away
6.58 MGD
Merrimac · 11 mi away
0.28 MGD
Billerica · 11 mi away
2.88 MGD
Ipswich · 15 mi away
0.5 MGD
Newburyport · 15 mi away
1.45 MGD
Salisbury · 15 mi away
0.59 MGD
Salem · 18 mi away
17.57 MGD
Concord · 20 mi away
0.68 MGD
Greater Lawrence 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 March 4, 2025.