What is the address of Joliet WWTP?

The address on the plant’s EPA facility record is .176Km S Of Front Ave E Off Cole Creek Rd, Joliet, MT 59041, in Carbon County. Its coordinates are 45.4866, -108.9618. For some plants the record holds the utility’s mailing address rather than the plant gate.

How much wastewater does Joliet WWTP treat?

Joliet WWTP treats an average of 0.05 MGD.

What treatment technology does Joliet WWTP use?

Klarifi has identified one treatment structure or unit process at the Joliet facility. The full treatment train, with exact unit counts, is shown in Klarifi with a free account.

What is the NPDES permit for Joliet WWTP?

The facility discharges under NPDES permit MT0020249, currently effective, expiring December 2027.

Is Joliet WWTP in compliance?

Discharge monitoring reports show 28 violations at Joliet WWTP in the last three years, 28 of them effluent limit exceedances. The full history is available in Klarifi.

Who operates Joliet WWTP and how do I contact them?

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

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Joliet WWTP

.176Km S Of Front Ave E Off Cole Creek Rd, Joliet, MT 59041 · Carbon County · Publicly Owned Treatment Works

Average flow: 0.05 MGD

Design flow: —

NPDES permit: MT0020249; Effective

Permit expires: December 2027

Population served: 577; CWNS 2022

Joliet WWTP is a publicly owned wastewater treatment works in Joliet, Carbon County, Montana treating an average of 0.05 million gallons per day, serving about 577 residents. It discharges under NPDES permit MT0020249 (effective), which expires in December 2027, with 28 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Joliet WWTP.

Available with a free Klarifi account

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

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Compliance snapshot (last 3 years)

Total violations: 28

Effluent violations: 28

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

Key contacts

3 verified contacts for Joliet WWTP, with validated emails and direct phone numbers.

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

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Nearby wastewater treatment plants in Montana

Fromberg Wastewater Treatment Facility

Fromberg · 7 mi away

0.04 MGD

Park City County Wastewater Treatment Facility

Park City · 10 mi away

0.08 MGD

Bridger WWTP

Bridger · 14 mi away

0.04 MGD

City Of Laurel, Water Treatment Plant

Laurel · 15 mi away

0.29 MGD

Town Of Columbus - Waste Water Treatment Facility

Columbus · 16 mi away

0.15 MGD

Red Lodge WWTF

Red Lodge · 23 mi away

—

City Of Billings Wastewater Treatment Plant

Billings · 32 mi away

20.32 MGD

Big Timber

Big Timber · 53 mi away

0.16 MGD

Joliet 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 August 19, 2026.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Equalization tank · Centrate · all terms

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