What is the address of Lower Dry Fork Lagoon?

The address on the plant’s EPA facility record is 16 Black Prairie Street, Box Elder, MT 59521, in Hill County. Its coordinates are 48.3026, -110.0036. For some plants the record holds the utility’s mailing address rather than the plant gate.

What treatment technology does Lower Dry Fork Lagoon use?

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

What is the NPDES permit for Lower Dry Fork Lagoon?

The facility discharges under NPDES permit MTG589702, currently effective, expiring March 2027.

Is Lower Dry Fork Lagoon in compliance?

Discharge monitoring reports show 114 violations at Lower Dry Fork Lagoon in the last three years. The full history is available in Klarifi.

Who operates Lower Dry Fork Lagoon and how do I contact them?

Lower Dry Fork Lagoon is a publicly owned treatment works in Box Elder, Montana. Klarifi lists decision-maker contacts for this facility, available with a free trial.

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Lower Dry Fork Lagoon

16 Black Prairie Street, Box Elder, MT 59521 · Hill County · Publicly Owned Treatment Works

Average flow: —

Design flow: —

NPDES permit: MTG589702; Effective

Permit expires: March 2027

Population served: —; CWNS 2022

Lower Dry Fork Lagoon is a publicly owned wastewater treatment works in Box Elder, Hill County, Montana. It discharges under NPDES permit MTG589702 (effective), which expires in March 2027, with 114 recorded violations in the last three years.

Treatment technology

One treatment structure or unit process identified at Lower Dry Fork Lagoon.

Available with a free Klarifi account

See the full treatment train at Lower Dry Fork Lagoon: structures, unit processes and planned upgrades, with exact unit counts.

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Compliance snapshot (last 3 years)

Total violations: 114

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 Lower Dry Fork Lagoon.

No verified contacts on file yet

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Nearby wastewater treatment plants in Montana

Multi-Community Lagoon

Box Elder · 4 mi away

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Azure Lagoon

Box Elder · 9 mi away

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Agency Lagoon

Box Elder · 10 mi away

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Havre WWTF

Havre · 24 mi away

1.68 MGD

City Of Chinook WTP

Chinook · 40 mi away

0.09 MGD

Chinook WWTP

Chinook · 41 mi away

0.05 MGD

Fort Benton WWTP

Fort Benton · 44 mi away

0.06 MGD

Town Of Chester WWTF

Chester · 46 mi away

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Lower Dry Fork Lagoon: 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 April 5, 2025.

Wastewater terms: POTW · MGD · NPDES permit · Inflow and infiltration · Biological nutrient removal · Tertiary treatment · all terms

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