Lac Courte Oreilles
13394 West Trepania Road, Hayward, WI 54843 · Sawyer County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 0.01 MGD
- Permit expires
- October 2026
- Population served
- —
Lac Courte Oreilles is a publicly owned wastewater treatment plant in Hayward, Sawyer County, Wisconsin. It discharges under NPDES permit WI0073041 (administratively continued), which expires in October 2026, with 393 recorded violations in the last three years. EPA has recorded 1 formal enforcement action naming the plant, the latest in January 2023.
Treatment technology
Treatment structures and unit processes at Lac Courte Oreilles.
Treatment structure data not yet analyzed for this facility.
Compliance snapshot (last 3 years)
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
- Total violations
- 393
- Effluent violations
- 5
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Lac Courte Oreilles in EPA's ICIS system.
- Formal actions
- 1
- Compliance actions
- $10,000
- EPA inspections
- 0
Latest case
Administrative order · CWA, NPDES Permit Violations · Final Order Issued · Compliance actions $10,000
“final Administrative Order on Consent (?AOC?) designed to bring the Lac Courte Oreilles Band of Lake Superior Chippewa Indians? (LCO) Reserve Lagoon facility (?Facility?) into compliance with its…”
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Key contacts
Decision-makers at Lac Courte Oreilles.
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Lac Courte Oreilles: frequently asked questions
What is the address of Lac Courte Oreilles?
The address on the plant’s EPA facility record is 13394 West Trepania Road, Hayward, WI 54843, in Sawyer County. Its coordinates are 45.9418, -91.3611. For some plants the record holds the utility’s mailing address rather than the plant gate.
How much wastewater does Lac Courte Oreilles treat?
Lac Courte Oreilles is permitted for a design flow of 0.01 MGD. Its average daily flow is not available in the current EPA data.
Has Lac Courte Oreilles been subject to EPA enforcement action?
EPA's enforcement records list 1 formal civil enforcement case naming Lac Courte Oreilles, 1 since fiscal year 2020. The latest case reached its current status in January 2023 (administrative order, final order issued). The full case history, with milestones, violation types and EPA's case summaries, is shown in Klarifi with a free account.
What is the NPDES permit for Lac Courte Oreilles?
The facility discharges under NPDES permit WI0073041, currently administratively continued, expiring October 2026.
Is Lac Courte Oreilles in compliance?
Discharge monitoring reports show 393 violations at Lac Courte Oreilles in the last three years, 5 of them effluent limit exceedances. The full history is available in Klarifi.
Who operates Lac Courte Oreilles and how do I contact them?
Lac Courte Oreilles is a publicly owned treatment works in Hayward, Wisconsin. Klarifi lists decision-maker contacts for this facility, available with a free trial.
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