Salisbury Wastewater Treatment Facility
Salisbury, MA · Essex County · Publicly Owned Treatment Works
- Average flow
- 0.59 MGD
- Design flow
- 1.3 MGD
- NPDES permit
- MA0102873
- Administratively continued
- Permit expires
- January 2021
- Population served
- 6,401
- CWNS 2022
Salisbury Wastewater Treatment Facility is a publicly owned wastewater treatment works in Salisbury, Essex County, Massachusetts treating an average of 0.59 million gallons per day against a permitted design capacity of 1.3 MGD, serving about 6,401 residents. Treatment on site includes clarifiers, aerated lagoons, disinfection, uv, flow equalization, lagoon, aerobic and other unit processes. It discharges under NPDES permit MA0102873 (administratively continued), which expires in January 2021, with 16 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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Aerated lagoons
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Disinfection, UV
unit processFlow Equalization
unit processLagoon, Aerobic
unit processLagoon, Anaerobic
unit processLagoon, Facultative
unit processMedia Filtration
unit processScreening
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Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 14
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Salisbury Wastewater Treatment Facility.
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Nearby wastewater treatment plants in Massachusetts
Newburyport · 2 mi away
1.45 MGD
Merrimac · 5 mi away
0.28 MGD
Ipswich · 11 mi away
0.5 MGD
Haverhill · 11 mi away
6.58 MGD
North Andover · 15 mi away
21.7 MGD
Manchester · 19 mi away
0.29 MGD
Salem · 22 mi away
17.57 MGD
Billerica · 26 mi away
2.88 MGD
Salisbury 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 19, 2025.