Twin Lakes Rsd/big Monon Bay
Monticello, IN · White County · Publicly Owned Treatment Works
- Average flow
- 0.25 MGD
- Design flow
- 0.79 MGD
- NPDES permit
- IN0060887
- Effective
- Permit expires
- November 2027
- Population served
- 5,769
- CWNS 2022
Twin Lakes Rsd/big Monon Bay is a publicly owned wastewater treatment plant in Monticello, White County, Indiana treating an average of 0.25 million gallons per day against a permitted design capacity of 0.79 MGD, serving about 5,769 residents. Treatment on site includes clarifiers, uncovered lagoons. It discharges under NPDES permit IN0060887 (effective), which expires in November 2027, with 0 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Twin Lakes Rsd/big Monon Bay.
No verified contacts on file yet
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Nearby wastewater treatment plants in Indiana
Monon · 5 mi away
0.16 MGD
Reynolds · 7 mi away
0.05 MGD
Monticello · 10 mi away
0.06 MGD
Burnettsville · 11 mi away
0.02 MGD
Francesville · 13 mi away
0.02 MGD
Wolcott · 14 mi away
0.09 MGD
Chalmers · 14 mi away
0.04 MGD
Royal Center · 15 mi away
0.33 MGD
Twin Lakes Rsd/big Monon Bay: 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 27, 2025.