What is the address of Chinook WWTP?

The address on the plant’s EPA facility record is 300 Daffy Hills Lane, Chinook, MT 59523, in Blaine County. Its coordinates are 48.5798, -109.2155. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Chinook WWTP treat?

Chinook WWTP treats an average of 0.05 MGD.

What treatment technology does Chinook WWTP use?

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

What is the NPDES permit for Chinook WWTP?

The facility discharges under NPDES permit MT0020125, currently administratively continued, expiring December 2025.

Is Chinook WWTP in compliance?

Discharge monitoring reports show no violations at Chinook WWTP in the last three years.

Who operates Chinook WWTP and how do I contact them?

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

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Chinook WWTP

300 Daffy Hills Lane, Chinook, MT 59523 · Blaine County · Publicly Owned Treatment Works

Average flow: 0.05 MGD

Design flow: —

NPDES permit: MT0020125; Administratively continued

Permit expires: December 2025

Population served: 1,310; CWNS 2022

Chinook WWTP is a publicly owned wastewater treatment works in Chinook, Blaine County, Montana treating an average of 0.05 million gallons per day, serving about 1,310 residents. It discharges under NPDES permit MT0020125 (administratively continued), which expires in December 2025, with 0 recorded violations in the last three years.

Treatment technology

2 treatment structures and unit processes identified at Chinook WWTP.

Available with a free Klarifi account

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

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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

Decision-makers at Chinook WWTP.

No verified contacts on file yet

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Nearby wastewater treatment plants in Montana

City Of Chinook WTP

Chinook · 1 mi away

0.09 MGD

Havre WWTF

Havre · 21 mi away

1.68 MGD

Azure Lagoon

Box Elder · 33 mi away

—

Agency Lagoon

Box Elder · 34 mi away

—

Multi-Community Lagoon

Box Elder · 38 mi away

—

Lower Dry Fork Lagoon

Box Elder · 41 mi away

—

Malta Sewage Treatment Lagoons

Malta · 63 mi away

—

Winifred Domestic WWTF

Winifred · 70 mi away

—

Chinook 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 29, 2025.

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

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