Greenfield Water Pollution Control Facility
Greenfield, MA · Franklin County · Publicly Owned Treatment Works
- Average flow
- 1.44 MGD
- Design flow
- —
- NPDES permit
- MAG590014
- Effective
- Permit expires
- October 2027
- Population served
- 13,193
- CWNS 2022
Greenfield Water Pollution Control Facility is a publicly owned wastewater treatment works in Greenfield, Franklin County, Massachusetts treating an average of 1.44 million gallons per day, serving about 13,193 residents. Treatment on site includes clarifiers, attached growth, aerobic, biosolids thickening, dechlorination, disinfection, chlorine/ chloramine and other unit processes. It discharges under NPDES permit MAG590014 (effective), which expires in October 2027, with 31 recorded violations in the last three years. Planned upgrades on record: biological n removal.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Attached Growth, Aerobic
unit processBiosolids Thickening
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processBiological N removal
planned upgradeUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 31
- Effluent violations
- 31
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Greenfield Water Pollution Control Facility, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Greenfield Water Pollution Control Facility, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
Montague · 1 mi away
0.54 MGD
Deerfield · 2 mi away
0.07 MGD
Erving · 5 mi away
0.06 MGD
Shelburne · 7 mi away
0.11 MGD
Sunderland · 8 mi away
0.13 MGD
Erving · 10 mi away
0.0027 MGD
Erving · 11 mi away
1.72 MGD
Hatfield · 12 mi away
0.14 MGD
Greenfield Water Pollution Control 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.