Rosendale (t) STP
136 Creek Locks Rd, Rosendale, NY 12472 · Ulster County · Publicly Owned Treatment Works
- Average flow
- 0.07 MGD
- Design flow
- 0.1 MGD
- NPDES permit
- NY0109061
- Effective
- Permit expires
- April 2031
- Population served
- 1,642
- CWNS 2022
Rosendale (t) STP is a publicly owned wastewater treatment works in Rosendale, Ulster County, New York treating an average of 0.07 million gallons per day against a permitted design capacity of 0.1 MGD, serving about 1,642 residents. It discharges under NPDES permit NY0109061 (effective), which expires in April 2031, with 38 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in February 2017.
Treatment technology
One treatment structure or unit process identified at Rosendale (t) STP.
Available with a free Klarifi account
See the full treatment train at Rosendale (t) STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 38
- Effluent violations
- 18
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Rosendale (t) STP in EPA's ICIS system.
- Formal actions
- 1
- 0 since FY2020
- Compliance actions
- $1M
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Feb 2017
Rosendale Wastewater Treatment Plant
Administrative order · CWA, NPDES Permit Violations · Unilateral Administrative Order Without Adjudication · Compliance actions $1M
EPA's description of the case:
“Respondent needs to implement upgrades to comply with chlorine and settle-able solids permit limits.”
Source: EPA ECHO, civil enforcement case 02-2017-3037.
Full case history with a free Klarifi account
Every action against Rosendale (t) STP with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Key contacts
Decision-makers at Rosendale (t) STP.
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
New Paltz · 7 mi away
0.8 MGD
Kingston · 7 mi away
4.33 MGD
New Paltz · 7 mi away
0.0073 MGD
Rhinebeck · 8 mi away
0.003 MGD
Kingston · 9 mi away
1.13 MGD
Rhinebeck · 10 mi away
0.12 MGD
Hyde Park · 10 mi away
0.01 MGD
Highland · 11 mi away
1.1 MGD
Rosendale (t) STP: 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 October 26, 2026; facility record last updated November 28, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Ozonation · Activated sludge · all terms