Sackett Lake Sd STP
4052 Route 42, Monticello, NY 12701 · Sullivan County · Publicly Owned Treatment Works
- Average flow
- 0.18 MGD
- Design flow
- 0.5 MGD
- NPDES permit
- NY0030716
- Effective
- Permit expires
- March 2029
- Population served
- 1,220
- CWNS 2022
Sackett Lake Sd STP is a publicly owned wastewater treatment works in Monticello, Sullivan County, New York treating an average of 0.18 million gallons per day against a permitted design capacity of 0.5 MGD, serving about 1,220 residents. It discharges under NPDES permit NY0030716 (effective), which expires in March 2029, with 4 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Sackett Lake Sd STP.
Available with a free Klarifi account
See the full treatment train at Sackett Lake Sd STP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 4
- Effluent violations
- 4
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Sackett Lake Sd STP.
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Nearby wastewater treatment plants in New York
Monticello · 4 mi away
0.0028 MGD
Monticello · 4 mi away
0.02 MGD
Monticello · 5 mi away
1.37 MGD
Monticello · 6 mi away
0.33 MGD
White Lake · 7 mi away
—
Thompson · 9 mi away
0.23 MGD
Woodridge · 10 mi away
0.51 MGD
South Fallsburg · 10 mi away
1.66 MGD
Sackett Lake Sd 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 26, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms