Plymouth Wastewater Treatment Facility
Plymouth, MA · Plymouth County · Publicly Owned Treatment Works
- Average flow
- 1.31 MGD
- Design flow
- —
- NPDES permit
- MAG590040
- Effective
- Permit expires
- October 2027
- Population served
- 12,121
- CWNS 2022
Plymouth Wastewater Treatment Facility is a publicly owned wastewater treatment works in Plymouth, Plymouth County, Massachusetts treating an average of 1.31 million gallons per day, serving about 12,121 residents. Treatment on site includes uncovered lagoons, biogas balloons, biological n removal, biological treatment, other, biosolids chemical addition and other unit processes. It discharges under NPDES permit MAG590040 (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.
Uncovered lagoons
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Biogas balloons
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Biological N removal
unit processBiological Treatment, Other
unit processBiosolids Chemical Addition
unit processBiosolids Mechanical Dewatering
unit processBiosolids Thickening
unit processChemical Addition, Alum
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processFlow Equalization
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
7 verified contacts for Plymouth Wastewater Treatment Facility, with validated emails and direct phone numbers.
Unlock 7 verified contacts (4 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Plymouth Wastewater Treatment Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Middleborough · 14 mi away
1.09 MGD
Bridgewater · 16 mi away
0.15 MGD
Marion · 17 mi away
0.09 MGD
Rockland · 18 mi away
2 MGD
Brockton · 20 mi away
9.9 MGD
Cohasset · 23 mi away
0.21 MGD
Taunton · 24 mi away
5.36 MGD
New Bedford · 27 mi away
16.7 MGD
Plymouth 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 26, 2025.