How much wastewater does Erwin Utilities Authority treat?

Erwin Utilities Authority is permitted for a design flow of 1.9 MGD. Its average daily flow is not available in the current EPA data.

What treatment technology does Erwin Utilities Authority use?

Klarifi has identified clarifiers, biogas silos at the Erwin facility.

What is the NPDES permit for Erwin Utilities Authority?

The facility discharges under NPDES permit TN0023001, currently administratively continued, expiring January 2025.

Is Erwin Utilities Authority in compliance?

Discharge monitoring reports show 2 violations at Erwin Utilities Authority in the last three years, 2 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Erwin Utilities Authority and how do I contact them?

Erwin Utilities Authority is a publicly owned treatment works in Erwin, Tennessee. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Erwin Utilities Authority

Erwin, TN · 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. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit TN0023001 (administratively continued), which expires in January 2025, with 2 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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Biogas silos

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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

Town Of Jonesborough Dba Pliny Fisk Composting And Recycling Center

Jonesboro · 10 mi away

0.69 MGD

Knob Creek Waste Water Plant

Johnson City · 17 mi away

3.07 MGD

Johnson City STP

Johnson City · 17 mi away

5.49 MGD

Hampton Elementary School

Hampton · 18 mi away

0.004 MGD

Elizabethton WWTP

Elizabethton · 18 mi away

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Roan Mountain State Park

Roan Mountain · 19 mi away

0.0042 MGD

Cloudland School

Roan Mountain · 20 mi away

0.003 MGD

Denzil Bowman Wastewater Treatment Plant (greeneville Stp)

Greeneville · 23 mi away

3.34 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 September 11, 2026; facility record last updated March 2, 2025.

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