LivewellIdaho · River
Portneuf River
Is the fish you caught here safe to eat? Below is every consumption advisory on file for Portneuf River, by species and size, in plain English — plus what's legal to keep.
3 species with advisories · contaminants: Mercury
Idaho also has statewide guidance
Idaho publishes rules that apply to rivers across the state — 2 recommendations covering 2 species — in addition to anything listed for Portneuf River below.
Strictest statewide rule: Largemouth Bass — Limit to one meal per month due to elevated Mercury.
What's safe to eat from Portneuf River
Brown Trout
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-11-06
Cutthroat Trout
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-11-06
Rainbow Trout
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-11-06
Is it legal to keep?
These are Idaho's statewide limits — a water-specific rule may override them. Always verify the current regulations before keeping a fish.
| Species | Size | Daily limit | Open season | Keep season |
|---|---|---|---|---|
| Rainbow Trout | — | 6 | Year-round | Same as open |
| Cutthroat Trout | — | 6 | Year-round | Same as open |
| Brown Trout | — | 6 | Year-round | Same as open |
| Lake Trout | — | 6 | Year-round | Same as open |
| Brook Trout | — | 25 | Year-round | Same as open |
| Bull Trout | — | 0 | Year-round | Same as open |
| Largemouth Bass | 12" min | 6 | Year-round | Same as open |
| Smallmouth Bass | 12" min | 6 | Year-round | Same as open |
| Walleye | — | 6 | Year-round | Same as open |
| Northern Pike | — | — | Year-round | Same as open |
| Mountain Whitefish | — | 25 | Year-round | Same as open |
| Kokanee | — | 6 | Year-round | Same as open |
| White Sturgeon | — | 0 | Year-round | Same as open |
| Tiger Muskie | 40" min | 2 | Year-round | Same as open |
| Black Crappie | — | — | Year-round | Same as open |
| White Crappie | — | — | Year-round | Same as open |
| Bluegill | — | — | Year-round | Same as open |
| Yellow Perch | — | — | Year-round | Same as open |
| Channel Catfish | — | — | Year-round | Same as open |
Official rules: Idaho — Idaho Fish & Game