Mawc, Orrick WWTF
Orrick, MO · Ray County · Publicly Owned Treatment Works
- Average flow
- 0.03 MGD
- Design flow
- —
- NPDES permit
- MO0022918
- Administratively continued
- Permit expires
- December 2023
- Population served
- 824
- CWNS 2022
Mawc, Orrick WWTF is a publicly owned wastewater treatment works in Orrick, Ray County, Missouri treating an average of 0.03 million gallons per day, serving about 824 residents. Treatment on site includes lagoon, aerobic. It discharges under NPDES permit MO0022918 (administratively continued), which expires in December 2023, with 63 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Lagoon, Aerobic
unit processUnlock exact unit counts →
Compliance snapshot (last 3 years)
- Total violations
- 63
- Effluent violations
- 63
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mawc, Orrick WWTF.
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Mawc, Orrick 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 September 11, 2026; facility record last updated August 14, 2024.