Tomahawk Waterworks
W5846 Dean Road, Tomahawk, WI 54487 · Lincoln County · Publicly Owned Treatment Works
- Average flow
- 0.41 MGD
- Design flow
- 0.42 MGD
- NPDES permit
- WI0021946
- Expired
- Permit expires
- December 2023
- Population served
- 3,912
- CWNS 2022
Tomahawk Waterworks is a publicly owned wastewater treatment plant in Tomahawk, Lincoln County, Wisconsin treating an average of 0.41 million gallons per day against a permitted design capacity of 0.42 MGD, serving about 3,912 residents. It discharges under NPDES permit WI0021946 (expired), which expires in December 2023, with 3 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Tomahawk Waterworks.
Available with a free Klarifi account
See the full treatment train at Tomahawk Waterworks: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 3
- Effluent violations
- 3
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Tomahawk Waterworks, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Tomahawk Waterworks, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Gleason · 14 mi away
0.07 MGD
Merrill · 19 mi away
—
Rhinelander · 19 mi away
0.94 MGD
Rib Lake · 26 mi away
0.09 MGD
Westboro · 28 mi away
0.01 MGD
Prentice · 29 mi away
0.21 MGD
Brokaw · 29 mi away
0.03 MGD
Minocqua · 30 mi away
0.16 MGD
Tomahawk Waterworks: 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 · Activated sludge · Oxidation ditch · all terms