Spencer Wastewater Treatment Plant
Spencer, MA · Worcester County · Publicly Owned Treatment Works
- Average flow
- 0.44 MGD
- Design flow
- —
- NPDES permit
- MAG590010
- Effective
- Permit expires
- October 2027
- Population served
- 4,749
- CWNS 2022
Spencer Wastewater Treatment Plant is a publicly owned wastewater treatment works in Spencer, Worcester County, Massachusetts treating an average of 0.44 million gallons per day, serving about 4,749 residents. Treatment on site includes clarifiers, biogas balloons, biological p removal, biosolids thickening, chemical addition, alum and other unit processes. It discharges under NPDES permit MAG590010 (effective), which expires in October 2027, with 20 recorded violations in the last three years. Planned upgrades on record: biological n removal, filtration.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Biogas balloons
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Biological P removal
unit processBiosolids Thickening
unit processChemical Addition, Alum
unit processChemical P Removal
unit processConstructed Wetland
unit processDisinfection, UV
unit processScreening
unit processSuspended Growth, Aerobic
unit processBiological N removal
planned upgradeFiltration
planned upgradeUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 20
- Effluent violations
- 20
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
6 verified contacts for Spencer Wastewater Treatment Plant, with validated emails and direct phone numbers.
Unlock 6 verified contacts (3 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Spencer Wastewater Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Massachusetts
North Brookfield · 3 mi away
0.29 MGD
Leicester · 5 mi away
0.09 MGD
Charlton · 6 mi away
0.31 MGD
North Oxford · 7 mi away
0.17 MGD
Hardwick · 10 mi away
0.01 MGD
Gilbertville · 11 mi away
0.44 MGD
Millbury · 12 mi away
24.1 MGD
Palmer (three Rivers) · 18 mi away
1.2 MGD
Spencer Wastewater Treatment Plant: 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 7, 2025.