Waukesha Waste Water Treatment Plant
600 Sentry Dr, Waukesha, WI 53186 · Waukesha County · Publicly Owned Treatment Works
- Average flow
- 3.33 MGD
- Design flow
- 16 MGD
- NPDES permit
- WI0029971
- Administratively continued
- Permit expires
- June 2018
- Population served
- 72,784
- CWNS 2022
Waukesha Waste Water Treatment Plant is a publicly owned wastewater treatment works in Waukesha, Waukesha County, Wisconsin treating an average of 3.33 million gallons per day against a permitted design capacity of 16 MGD, serving about 72,784 residents. It discharges under NPDES permit WI0029971 (administratively continued), which expires in June 2018, with 3 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Waukesha Waste Water Treatment Plant.
Available with a free Klarifi account
See the full treatment train at Waukesha Waste Water Treatment Plant: 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.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Waukesha Waste Water Treatment Plant in EPA's ICIS system.
- Formal actions
- 0
- none on record
- EPA inspections
- 1
- none on record
No formal federal enforcement case is on record for this plant.
Full case history with a free Klarifi account
Every action against Waukesha Waste Water Treatment Plant with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Waukesha
Waukesha's capital improvement plan lists 36 water, sewer and wastewater line items worth $61M starting 2025–2029. The largest budgeted items are shown here.
All water and sewer capital projects in Waukesha →
| Project | Budget | Years |
|---|---|---|
| Sanitary Sewer Rehabilitation | $19,320,000 | 2025–2029 |
| Facility Plan 11-15 Yr Upgrades | $14,581,000 | 2025–2027 |
| Bio-Gas Purification for Reuse System | $5,100,000 | 2029–2029 |
| Sanitary Pump Station & Force Main Rehab. | $5,000,000 | 2025–2029 |
| Bldgs. 110 & 140 Emergency Backup Generator Repl. | $4,685,000 | 2025–2025 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
8 verified contacts for Waukesha Waste Water Treatment Plant, with validated emails and direct phone numbers.
Unlock 8 verified contacts (5 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Waukesha Waste Water Treatment Plant, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Wisconsin
Brookfield · 5 mi away
10.11 MGD
Sussex · 9 mi away
2.75 MGD
Delafield · 9 mi away
2.24 MGD
Dousman · 12 mi away
0.2 MGD
Wind Lake · 14 mi away
0.99 MGD
Oconomowoc · 15 mi away
—
Milwaukee · 17 mi away
103.5 MGD
Palmyra · 18 mi away
0.16 MGD
Waukesha Waste Water 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 October 26, 2026; facility record last updated April 13, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Tertiary treatment · Significant industrial user · all terms