LivewellUtah · Duchesne County · Reservoir
Big Sand Wash Reservoir
Is the fish you caught here safe to eat? Below is every consumption advisory on file for Big Sand Wash Reservoir, by species and size, in plain English — plus what's legal to keep.
4 species with advisories · contaminants: Mercury
What's safe to eat from Big Sand Wash Reservoir
Brown Trout
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: limit to two meals per month due to elevated Mercury. | |
| Pregnant or breastfeeding women | For pregnant or breastfeeding women: limit to 6 meals per year due to elevated Mercury. |
Source: official advisory· updated 2026-07-06
Smallmouth Bass
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per month due to elevated Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: limit to one meal per month due to elevated Mercury. | |
| Pregnant or breastfeeding women | For pregnant or breastfeeding women: do not eat due to elevated Mercury. |
Source: official advisory· updated 2026-07-06
Walleye
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: limit to two meals per month due to elevated Mercury. | |
| Pregnant or breastfeeding women | For pregnant or breastfeeding women: limit to 6 meals per year due to elevated Mercury. |
Source: official advisory· updated 2026-07-06
Yellow Perch
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Women who may become pregnant & children under 15 | For women who may become pregnant, pregnant or breastfeeding women, and children under 15: limit to one meal per month due to elevated Mercury. | |
| Pregnant or breastfeeding women | For pregnant or breastfeeding women: do not eat due to elevated Mercury. |
Source: official advisory· updated 2026-07-06
Is it legal to keep?
These are Utah'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 | — | 4 | Year-round | Same as open |
| Brown Trout | — | 4 | Year-round | Same as open |
| Cutthroat Trout | — | 4 | Year-round | Same as open |
| Tiger Trout | — | 4 | Year-round | Same as open |
| Splake | — | 4 | Year-round | Same as open |
| Lake Trout | — | 4 | Year-round | Same as open |
| Kokanee | — | 4 | Year-round | Same as open |
| Walleye | — | 10 | Year-round | Same as open |
| Largemouth Bass | — | 6 | Year-round | Same as open |
| Smallmouth Bass | — | 6 | Year-round | Same as open |
| Hybrid Striped Bass | — | 3 | Year-round | Same as open |
| Striped Bass | — | — | Year-round | Same as open |
| Tiger Muskie | 40" min | 1 | Year-round | Same as open |
| Yellow Perch | — | 50 | Year-round | Same as open |
| Black Crappie | — | 50 | Year-round | Same as open |
| Bluegill | — | 50 | Year-round | Same as open |
| Channel Catfish | — | 8 | Year-round | Same as open |
| Northern Pike | — | 20 | Year-round | Same as open |
| Burbot | — | — | Year-round | Same as open |
Official rules: Utah — Utah DWR
Getting on the water
- Big Sandwash Reservoir Boat Ramp boat ramp 0.4 mi Directions
Access points from OpenStreetMap contributors.