What is the address of Winkelman WWTP?

The address on the plant’s EPA facility record is 425 W Quarelli St, Winkelman, AZ 85192, in Gila County. Its coordinates are 32.9856, -110.7754. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Winkelman WWTP treat?

Winkelman WWTP treats an average of 0.01 MGD and is permitted for a design flow of 0.08 MGD.

What is the NPDES permit for Winkelman WWTP?

The facility discharges under NPDES permit AZ0020176, currently effective, expiring May 2029.

Is Winkelman WWTP in compliance?

Discharge monitoring reports show 27 violations at Winkelman WWTP in the last three years, 11 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Winkelman WWTP and how do I contact them?

Winkelman WWTP is a publicly owned treatment works in Winkelman, Arizona. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Winkelman WWTP

425 W Quarelli St, Winkelman, AZ 85192 · Gila County · Publicly Owned Treatment Works

Average flow: 0.01 MGD

Design flow: 0.08 MGD

NPDES permit: AZ0020176; Effective

Permit expires: May 2029

Population served: 1,311; CWNS 2022

Winkelman WWTP is a publicly owned wastewater treatment works in Winkelman, Gila County, Arizona treating an average of 0.01 million gallons per day against a permitted design capacity of 0.08 MGD, serving about 1,311 residents. It discharges under NPDES permit AZ0020176 (effective), which expires in May 2029, with 27 recorded violations in the last three years.

Treatment technology

Treatment structures and unit processes at Winkelman WWTP.

Treatment structure data not yet analyzed for this facility.

Compliance snapshot (last 3 years)

Total violations: 27

Effluent violations: 11

Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.

Key contacts

Decision-makers at Winkelman WWTP.

No verified contacts on file yet

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Town Of Superior Wastewater Treatment Plant (wwtp)

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North Florence Wwtp, Town Of Florence

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Town Of Florence WWTP

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Town Of Marana Water Reclamation Facility

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Pima County - Ina Road WWTP

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Winkelman 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 November 3, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Activated sludge · Oxidation ditch · all terms

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