Nixa WWTF
Old Riverdale Public Rd, Nixa, MO 65714 · Christian County · Publicly Owned Treatment Works
- Average flow
- 1.66 MGD
- Design flow
- —
- NPDES permit
- MO0028037
- Effective
- Permit expires
- June 2028
- Population served
- 22,086
- CWNS 2022
Nixa WWTF is a publicly owned wastewater treatment works in Nixa, Christian County, Missouri treating an average of 1.66 million gallons per day, serving about 22,086 residents. It discharges under NPDES permit MO0028037 (effective), which expires in June 2028, with 16 recorded violations in the last three years. EPA has recorded 2 formal enforcement actions naming the plant, the latest in October 2025.
Treatment technology
9 treatment structures and unit processes identified at Nixa WWTF.
Available with a free Klarifi account
See the full treatment train at Nixa WWTF: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 16
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
EPA enforcement history
Federal civil enforcement cases, compliance inspections and informal actions recorded for Nixa WWTF in EPA's ICIS system.
- Formal actions
- 2
- 1 since FY2020
- Penalties assessed
- $3,000
- all cases
- Compliance actions
- $16,900
- required by EPA orders
- EPA inspections
- 0
- none on record
Latest case · Oct 2025
City of Nixa Biosolids ESA CWA 309G2E AO For Class I Penalties - Biosolids Expedited Settlement Prog
Administrative order · CWA, NPDES Permit Violations · Final Order With Penalty · Penalty $3,000
EPA's description of the case:
“Facility land applied biosolids above the 40 CF 503.13 ceiling limits.”
Source: EPA ECHO, civil enforcement case 07-2025-0113.
Full case history with a free Klarifi account
Every action against Nixa WWTF with dates, milestones, violation types and EPA's complete case summaries, plus inspections and informal actions.
Capital improvement projects in Nixa
Nixa's capital improvement plan lists 13 water, sewer and wastewater line items worth $9M starting 2025–2028. The largest budgeted items are shown here.
All water and sewer capital projects in Nixa →
| Project | Budget | Years |
|---|---|---|
| Water Tower #9 | $2,700,000 | 2025–2025 |
| Well 14 | $1,000,000 | 2028–2028 |
| Nixa North Loop Water Main | $1,000,000 | 2026–2026 |
| Sludge Holding Basin | $1,000,000 | 2025–2025 |
| New Vactor Truck | $750,000 | 2027–2027 |
Full project details — scope, funding source, engineering consultant and the decision-makers behind each project — are available in Klarifi, along with similar wastewater capital projects in other cities.
Key contacts
Decision-makers at Nixa WWTF.
No verified contacts on file yet
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Nearby wastewater treatment plants in Missouri
Ozark · 1 mi away
0.64 MGD
Ozark · 3 mi away
0.99 MGD
Nixa · 4 mi away
0.12 MGD
Highlandville · 7 mi away
0.11 MGD
Springfield · 10 mi away
30.9 MGD
Sparta · 11 mi away
0.16 MGD
Clever · 11 mi away
0.18 MGD
Republic · 13 mi away
1.65 MGD
Nixa WWTF: 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 12, 2026; facility record last updated September 16, 2026.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Oxidation ditch · Anaerobic digester · all terms