Zionsville WWTP
Zionsville, IN · Boone County · Publicly Owned Treatment Works
- Average flow
- 0.86 MGD
- Design flow
- 2 MGD
- NPDES permit
- IN0036951
- Effective
- Permit expires
- December 2028
- Population served
- 13,000
- CWNS 2022
Zionsville WWTP is a publicly owned wastewater treatment works in Zionsville, Boone County, Indiana treating an average of 0.86 million gallons per day against a permitted design capacity of 2 MGD, serving about 13,000 residents. Treatment on site includes clarifiers, carrousels / oxidation ditches, biogas silos. It discharges under NPDES permit IN0036951 (effective), which expires in December 2028, with 10 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
- 10
- Effluent violations
- 8
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
2 verified contacts for Zionsville WWTP, with validated emails and direct phone numbers.
Unlock 2 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Zionsville WWTP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in Indiana
Westfield · 6 mi away
3.4 MGD
Whitestown · 6 mi away
1.32 MGD
Indianapolis · 10 mi away
7.22 MGD
Brownsburg · 10 mi away
2.24 MGD
Fishers · 11 mi away
6.9 MGD
Pittsboro · 11 mi away
0.59 MGD
Avon · 13 mi away
1.82 MGD
Lebanon · 13 mi away
2.04 MGD
Zionsville WWTP: 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 August 3, 2026.