Joco Mill Creek Regional Wtf
20001 West 47th St., Shawnee, KS 66218 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 11.46 MGD
- Design flow
- —
- NPDES permit
- KS0088269
- Effective
- Permit expires
- January 2030
- Population served
- 80,102
- CWNS 2022
Joco Mill Creek Regional Wtf is a publicly owned wastewater treatment plant in Shawnee, Johnson County, Kansas treating an average of 11.46 million gallons per day, serving about 80,102 residents. It discharges under NPDES permit KS0088269 (effective), which expires in January 2030, with 0 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified at Joco Mill Creek Regional Wtf.
Available with a free Klarifi account
See the full treatment train at Joco Mill Creek Regional Wtf: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 0
- Effluent violations
- 0
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Joco Mill Creek Regional Wtf.
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Kansas City · 2 mi away
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Leavenworth · 6 mi away
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Mission · 9 mi away
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Basehor · 9 mi away
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Basehor · 10 mi away
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Olathe · 10 mi away
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Joco Mill Creek Regional Wtf: 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 March 9, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms