Millbrook Sewage Treatment Plant
Millbrook, NY · Dutchess County · Publicly Owned Treatment Works
- Average flow
- 0.11 MGD
- Design flow
- 0.25 MGD
- NPDES permit
- NY0025429
- Effective
- Permit expires
- December 2030
- Population served
- 1,443
- CWNS 2022
Millbrook Sewage Treatment Plant is a publicly owned wastewater treatment works in Millbrook, Dutchess County, New York treating an average of 0.11 million gallons per day against a permitted design capacity of 0.25 MGD, serving about 1,443 residents. It discharges under NPDES permit NY0025429 (effective), which expires in December 2030, with 99 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
- Total violations
- 99
- Effluent violations
- 31
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Millbrook Sewage Treatment Plant.
No verified contacts on file yet
Klarifi verifies plant and municipal decision-makers continuously. Start a free trial to browse contacts at nearby plants and flag this one for verification.
Nearby wastewater treatment plants in New York
Pleasant Valley · 7 mi away
0.000000021 MGD
Hyde Park · 9 mi away
0.05 MGD
Poughquag · 11 mi away
0.01 MGD
Hyde Park · 12 mi away
0.000000015 MGD
Poughkeepsie · 12 mi away
0.01 MGD
Rhinebeck · 13 mi away
0.000000002 MGD
Poughkeepsie · 13 mi away
6.18 MGD
Highland · 14 mi away
0.76 MGD
Millbrook Sewage 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 28, 2025.