Erwin Utilities Authority
450 N. Industrial Dr., Erwin, TN 37650 · Unicoi County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 1.9 MGD
- NPDES permit
- TN0023001
- Administratively continued
- Permit expires
- January 2025
- Population served
- 9,482
- CWNS 2022
Erwin Utilities Authority is a publicly owned wastewater treatment plant in Erwin, Unicoi County, Tennessee, serving about 9,482 residents. It discharges under NPDES permit TN0023001 (administratively continued), which expires in January 2025, with 2 recorded violations in the last three years.
Treatment technology
2 treatment structures and unit processes identified at Erwin Utilities Authority.
Available with a free Klarifi account
See the full treatment train at Erwin Utilities Authority: 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 Erwin Utilities Authority.
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Nearby wastewater treatment plants in Tennessee
Chuckey · 16 mi away
—
Johnson City · 17 mi away
3.26 MGD
Johnson City · 17 mi away
5.94 MGD
Hampton · 18 mi away
0.0046 MGD
Elizabethton · 18 mi away
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Roan Mountain · 19 mi away
0.0036 MGD
Elizabethton · 19 mi away
0.007 MGD
Roan Mountain · 20 mi away
0.0028 MGD
Erwin Utilities Authority: 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 March 2, 2025.
Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms