When will the nutrient treatment occur?

Treatment runs from June 1 through September 30, 2026.

Where exactly is the discharge located?

About 200 meters below the Leonia Bridge at the Idaho–Montana border near Leonia, MT.

Can I boat in the treatment area?

Yes — boating activities will not be affected and the discharge will be clearly marked.

How close can I take water or swim near the discharge?

Do not take river water within 100 yards of the discharge and avoid swimming within 50 yards.

Public Notice — Bonners Ferry (SR239375)

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Affects:General PublicProperty Buyers

The Kootenai Tribe of Idaho will add nitrogen and phosphorus (urea-ammonium-polyphosphate) to the Kootenai River from June 1–September 30, 2026, discharging near Leonia, MT and affecting river reach downstream to Bonners Ferry, ID. Safety distances and marking will be used.

Key Takeaways

Treatment runs June 1–September 30, 2026
Discharge near Leonia Bridge (~200 m below)
Do not take river water within 100 yards of discharge
No swimming within 50 yards of discharge pipe
Boating not affected; discharge marked for boaters

Published: May 17, 2026 · 4 days ago
Category: Other
City: Bonners Ferry
Case #: SR239375

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What to do next

1
Avoid water intake and swimming near discharge
Do not take drinking water within 100 yards or swim within 50 yards of the discharge from June 1–September 30, 2026.
2
Watch for marked discharge location
Look for markers about 200 meters below the Leonia Bridge when boating between Leonia and Bonners Ferry.
3
Contact project manager for details
Call Brandon Diller at 208-267-3620 for project specifics or concerns.

Frequently asked questions

When will the nutrient treatment occur?: Treatment runs from June 1 through September 30, 2026.
Where exactly is the discharge located?: About 200 meters below the Leonia Bridge at the Idaho–Montana border near Leonia, MT.
Can I boat in the treatment area?: Yes — boating activities will not be affected and the discharge will be clearly marked.
How close can I take water or swim near the discharge?: Do not take river water within 100 yards of the discharge and avoid swimming within 50 yards.

The suggestions and answers above are AI-generated for general information only. They can be wrong, and we don't take responsibility for their accuracy. Talk to a qualified professional before acting on them.

Legal terms in this notice

discharge point: The specific location where a substance is released into the river.
urea-ammonium-polyphosphate: A dissolved fertilizer mix containing nitrogen and phosphorus used to add nutrients to water.

Full Notice Text

The Kootenai Tribe of Idaho will be adding liquid nutrients (nitrogen and phosphorus) to the Kootenai River. The discharge point will be at the Idaho-Montana border, near Leonia, MT. The treatment dates will be June 1st to the 30th of September, 2026. The effective treatment distance will be to Bonners Ferry, Idaho. The nitrogen solution consists of urea-ammonium-polyphosphate. In order to allow proper mixing for safe drinking water, water should not be taken from the river within 100 yards of the discharge point; swimming should not occur within 50 yards of the discharge pipe. Location of the discharge point will be clearly marked for those boating nearby (approx. 200 meters below the Leonia Bridge). Boating activities will not be affected. Call Brandon Diller (208.267.3620) Kootenai Tribe project manager, for further details about the project.
SR239375