Green Castle WWTF
59 Front Street, Green Castle, MO 63544 · Sullivan County · Publicly Owned Treatment Works
- Average flow
- 0.04 MGD
- Design flow
- —
- NPDES permit
- MO0103322
- Effective
- Permit expires
- September 2027
- Population served
- 176
- CWNS 2022
Green Castle WWTF is a publicly owned wastewater treatment works in Green Castle, Sullivan County, Missouri treating an average of 0.04 million gallons per day, serving about 176 residents. It discharges under NPDES permit MO0103322 (effective), which expires in September 2027, with 0 recorded violations in the last three years.
Treatment technology
One treatment structure or unit process identified at Green Castle WWTF.
Available with a free Klarifi account
See the full treatment train at Green Castle WWTF: 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 Green Castle WWTF.
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Nearby wastewater treatment plants in Missouri
Green City · 4 mi away
—
Novinger · 9 mi away
0.0054 MGD
Milan · 13 mi away
0.4 MGD
Kirksville · 16 mi away
0.0094 MGD
Unionville · 16 mi away
0.11 MGD
Unionville · 17 mi away
0.09 MGD
Kirksville · 18 mi away
2.71 MGD
Queen City · 20 mi away
0.0071 MGD
Green Castle 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 26, 2026; facility record last updated August 14, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms