Mcewen STP Aka Mcewen WWTP
Mcewen, TN · Humphreys County · Publicly Owned Treatment Works
- Average flow
- 0.2 MGD
- Design flow
- 0.6 MGD
- NPDES permit
- TN0021741
- Effective
- Permit expires
- July 2028
- Population served
- 1,802
- CWNS 2022
Mcewen STP Aka Mcewen WWTP is a publicly owned wastewater treatment works in Mcewen, Humphreys County, Tennessee treating an average of 0.2 million gallons per day against a permitted design capacity of 0.6 MGD, serving about 1,802 residents. Treatment on site includes clarifiers. It discharges under NPDES permit TN0021741 (effective), which expires in July 2028, with 24 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Clarifiers
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Compliance snapshot (last 3 years)
- Total violations
- 24
- Effluent violations
- 24
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
Decision-makers at Mcewen STP Aka Mcewen WWTP.
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Waverly · 13 mi away
0.49 MGD
Hurricane Mills · 18 mi away
0.04 MGD
Dickson · 18 mi away
2 MGD
Erin · 19 mi away
0.6 MGD
New Johnsonville · 19 mi away
0.21 MGD
Cumberland City · 20 mi away
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White Bluff · 23 mi away
0.23 MGD
Centerville · 24 mi away
0.24 MGD
Mcewen STP Aka Mcewen 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 November 29, 2025.