Richmond Wastewater Treatment Facility
Richmond, ME · Sagadahoc County · Publicly Owned Treatment Works
- Average flow
- 0.09 MGD
- Design flow
- 0.32 MGD
- NPDES permit
- ME0100587
- Effective
- Permit expires
- May 2030
- Population served
- 1,419
- CWNS 2022
Richmond Wastewater Treatment Facility is a publicly owned wastewater treatment works in Richmond, Sagadahoc County, Maine treating an average of 0.09 million gallons per day against a permitted design capacity of 0.32 MGD, serving about 1,419 residents. Treatment on site includes carrousels / oxidation ditches, biogas balloons, biosolids aerobic digestion, biosolids mechanical dewatering, dechlorination and other unit processes. It discharges under NPDES permit ME0100587 (effective), which expires in May 2030, with 8 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Carrousels / oxidation ditches
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Biogas balloons
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Biosolids Aerobic Digestion
unit processBiosolids Mechanical Dewatering
unit processDechlorination
unit processDisinfection, chlorine/ chloramine
unit processPrimary Clarification or Sedimentation
unit processScreening
unit processSuspended Growth, Aerobic
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Compliance snapshot (last 3 years)
- Total violations
- 8
- Effluent violations
- 6
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Richmond Wastewater Treatment Facility.
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Nearby wastewater treatment plants in Maine
Wiscasset · 9 mi away
0.13 MGD
Lisbon · 14 mi away
0.37 MGD
Nobleboro · 14 mi away
0.002 MGD
Sabattus · 15 mi away
0.06 MGD
Boothbay Harbor · 18 mi away
0.0019 MGD
Freeport · 23 mi away
0.23 MGD
Yarmouth · 27 mi away
0.44 MGD
Yarmouth · 27 mi away
0.0032 MGD
Richmond 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 5, 2025.