Joco Nelson Complex Wastewater Plant
4800 Nall, Mission, KS 66202 · Johnson County · Publicly Owned Treatment Works
- Average flow
- 11.17 MGD
- Design flow
- —
- NPDES permit
- KS0055492
- Effective
- Permit expires
- January 2030
- Population served
- 104,169
- CWNS 2022
Joco Nelson Complex Wastewater Plant is a publicly owned wastewater treatment works in Mission, Johnson County, Kansas treating an average of 11.17 million gallons per day, serving about 104,169 residents. It discharges under NPDES permit KS0055492 (effective), which expires in January 2030, with 50 recorded violations in the last three years.
Treatment technology
3 treatment structures and unit processes identified, 1 planned upgrade on record at Joco Nelson Complex Wastewater Plant.
Available with a free Klarifi account
See the full treatment train at Joco Nelson Complex Wastewater Plant: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 50
- Effluent violations
- 50
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
11 verified contacts for Joco Nelson Complex Wastewater Plant, with validated emails and direct phone numbers.
Unlock 11 verified contacts (8 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Joco Nelson Complex Wastewater Plant, plus the full compliance history and discharge data.
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Overland Park · 9 mi away
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Kansas City · 9 mi away
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Shawnee · 9 mi away
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Bonner Springs · 11 mi away
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Joco Nelson Complex Wastewater 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 January 23, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Significant industrial user · WWTP · all terms