Dyer Wastewater Treatment Plant
Dyer, IN · Lake County · Publicly Owned Treatment Works
- Average flow
- 1.24 MGD
- Design flow
- 2.6 MGD
- NPDES permit
- IN0039331
- Effective
- Permit expires
- October 2028
- Population served
- 14,527
- CWNS 2022
Dyer Wastewater Treatment Plant is a publicly owned wastewater treatment works in Dyer, Lake County, Indiana treating an average of 1.24 million gallons per day against a permitted design capacity of 2.6 MGD, serving about 14,527 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit IN0039331 (effective), which expires in October 2028, with 1 recorded violation 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
- 1
- Effluent violations
- 1
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Dyer Wastewater Treatment Plant.
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Gary · 10 mi away
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Lowell · 13 mi away
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Crown Point · 15 mi away
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Dyer Wastewater 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 March 29, 2025.