Derby Wastewater Treatment
Derby, KS · Sedgwick County · Publicly Owned Treatment Works
- Average flow
- 2.19 MGD
- Design flow
- —
- NPDES permit
- KS0050377
- Effective
- Permit expires
- December 2027
- Population served
- 17,546
- CWNS 2022
Derby Wastewater Treatment is a publicly owned wastewater treatment works in Derby, Sedgwick County, Kansas treating an average of 2.19 million gallons per day, serving about 17,546 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches. It discharges under NPDES permit KS0050377 (effective), which expires in December 2027, with 61 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 61
- Effluent violations
- 61
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
24 verified contacts for Derby Wastewater Treatment, with validated emails and direct phone numbers.
Unlock 24 verified contacts (21 more than shown)
Names, validated emails and direct phone numbers for decision-makers at Derby Wastewater Treatment, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Kansas
Mulvane · 4 mi away
0.57 MGD
Haysville · 5 mi away
0.36 MGD
Peck · 7 mi away
—
Rose Hill · 9 mi away
0.28 MGD
Belle Plaine · 10 mi away
—
Wichita · 12 mi away
2.41 MGD
Clearwater · 12 mi away
—
Udall · 13 mi away
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Derby Wastewater Treatment: 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 March 4, 2025.