Thayer WWTP
100 Holmes St, Thayer, MO 65791 · Oregon County · Publicly Owned Treatment Works
- Average flow
- 0.22 MGD
- Design flow
- —
- NPDES permit
- MO0023132
- Effective
- Permit expires
- August 2028
- Population served
- 2,578
- CWNS 2022
Thayer WWTP is a publicly owned wastewater treatment works in Thayer, Oregon County, Missouri treating an average of 0.22 million gallons per day, serving about 2,578 residents. It discharges under NPDES permit MO0023132 (effective), which expires in August 2028, with 2 recorded violations in the last three years.
Treatment technology
4 treatment structures and unit processes identified at Thayer WWTP.
Available with a free Klarifi account
See the full treatment train at Thayer WWTP: structures, unit processes and planned upgrades, with exact unit counts.
Compliance snapshot (last 3 years)
- Total violations
- 2
- Effluent violations
- 2
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Thayer WWTP.
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Nearby wastewater treatment plants in Missouri
Koshkonong · 9 mi away
0.01 MGD
Alton · 14 mi away
0.12 MGD
West Plains · 22 mi away
1.48 MGD
Birch Tree · 33 mi away
0.07 MGD
Bakersfield · 34 mi away
0.37 MGD
Mountain View · 34 mi away
0.42 MGD
Winona · 36 mi away
0.1 MGD
Willow Springs · 39 mi away
0.42 MGD
Thayer 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 October 26, 2026; facility record last updated September 4, 2024.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms