What is the address of Chewelah WWTP?

The address on the plant’s EPA facility record is 120 S Hunt St, Chewelah, WA 99109, in Stevens County. Its coordinates are 48.2737, -117.7412. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Chewelah WWTP treat?

Chewelah WWTP treats an average of 0.37 MGD.

What treatment technology does Chewelah WWTP use?

Klarifi has identified 2 treatment structures and unit processes at the Chewelah facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Chewelah WWTP?

The facility discharges under NPDES permit WA0023604, currently administratively continued, expiring November 2016.

Is Chewelah WWTP in compliance?

Discharge monitoring reports show 1 violation at Chewelah WWTP in the last three years, 1 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Chewelah WWTP and how do I contact them?

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

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Chewelah WWTP

120 S Hunt St, Chewelah, WA 99109 · Stevens County · Publicly Owned Treatment Works

Average flow: 0.37 MGD

Design flow: —

NPDES permit: WA0023604; Administratively continued

Permit expires: November 2016

Population served: 3,297; CWNS 2022

Chewelah WWTP is a publicly owned wastewater treatment works in Chewelah, Stevens County, Washington treating an average of 0.37 million gallons per day, serving about 3,297 residents. It discharges under NPDES permit WA0023604 (administratively continued), which expires in November 2016, with 1 recorded violation in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Chewelah WWTP.

Available with a free Klarifi account

See the full treatment train at Chewelah WWTP: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 1

Effluent violations: 1

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

Key contacts

Decision-makers at Chewelah WWTP.

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Nearby wastewater treatment plants in Washington

Newport WWTP

Newport · 33 mi away

0.17 MGD

Ione STP

Ione · 36 mi away

0.1 MGD

Selkirk Schools And WWTP

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0.00082 MGD

Reardan Town STP

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Metaline STP

Metaline · 43 mi away

0.0094 MGD

Davenport WWTP

Davenport · 46 mi away

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Medical Lake WWTP

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Wilbur STP

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Chewelah 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 September 11, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Sludge dewatering · Biological nutrient removal · all terms

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