How much wastewater does City Of Williams - WWTP treat?

City Of Williams - WWTP is permitted for a design flow of 0.98 MGD. Its average daily flow is not available in the current EPA data.

What is the NPDES permit for City Of Williams - WWTP?

The facility discharges under NPDES permit AZ0025755, currently effective, expiring October 2029.

Is City Of Williams - WWTP in compliance?

Discharge monitoring reports show no violations at City Of Williams - WWTP in the last three years.

Who operates City Of Williams - WWTP and how do I contact them?

City Of Williams - WWTP is a publicly owned treatment works in Williams, Arizona. Klarifi lists 3 verified decision-maker contacts for this facility, available with a free trial.

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City Of Williams - WWTP

Q: What treatment technology does City Of Williams - WWTP use?

Klarifi has identified clarifiers, uncovered lagoons, carrousels / oxidation ditches at the Williams facility.

Williams, AZ · Coconino County · Publicly Owned Treatment Works

Average flow: —

Design flow: 0.98 MGD

NPDES permit: AZ0025755; Effective

Permit expires: October 2029

Population served: 3,361; CWNS 2022

City Of Williams - WWTP is a publicly owned wastewater treatment works in Williams, Coconino County, Arizona, serving about 3,361 residents. Treatment on site includes clarifiers, uncovered lagoons, carrousels / oxidation ditches. It discharges under NPDES permit AZ0025755 (effective), which expires in October 2029, with 0 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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Uncovered lagoons

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Carrousels / oxidation ditches

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Compliance snapshot (last 3 years)

Total violations: 0

Effluent violations: 0

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

Key contacts

3 verified contacts for City Of Williams - WWTP, with validated emails and direct phone numbers.

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Names, validated emails and direct phone numbers for decision-makers at City Of Williams - WWTP, plus the full compliance history and discharge data.

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Nearby wastewater treatment plants in Arizona

Rio De Flag WWTP

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Cottonwood WWTF

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1.04 MGD

Tusayan Sanitary District

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Town Of Prescott Valley - WWTP

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Tuba City WWTP

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American Gulch Wastewater Treatment Plant

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City Of Winslow - WWTP

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Town Of Cave Creek - WRF

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City Of Williams - 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 March 26, 2025.

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