Joco Tomahawk Creek
Leawood, KS · Johnson County · Publicly Owned Treatment Works
- Average flow
- 12.13 MGD
- Design flow
- —
- NPDES permit
- KS0100854
- Effective
- Permit expires
- April 2031
- Population served
- 43,021
- CWNS 2022
Joco Tomahawk Creek is a publicly owned wastewater treatment plant in Leawood, Johnson County, Kansas treating an average of 12.13 million gallons per day, serving about 43,021 residents. Treatment on site includes clarifiers, biogas silos, biogas balloons, biological n removal. It discharges under NPDES permit KS0100854 (effective), which expires in April 2031, with 1 recorded violation in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Biogas silos
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Biogas balloons
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Biological N removal
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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
4 verified contacts for Joco Tomahawk Creek, with validated emails and direct phone numbers.
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Names, validated emails and direct phone numbers for decision-makers at Joco Tomahawk Creek, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Kansas
Overland Park · 4 mi away
10.2 MGD
Stanley · 6 mi away
5.14 MGD
Mission · 8 mi away
7.21 MGD
Olathe · 11 mi away
1.3 MGD
Kansas City · 12 mi away
0.03 MGD
Kansas City · 12 mi away
2.64 MGD
Kansas City · 13 mi away
15.44 MGD
Shawnee · 13 mi away
9.47 MGD
Joco Tomahawk Creek: 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 February 28, 2025.