LivewellMinnesota · Washington County · Lake
Lake Olson
Is the fish you caught here safe to eat? Below is every consumption advisory on file for Lake Olson, by species and size, in plain English — plus what's legal to keep.
5 species with advisories · contaminants: Mercury, PFOS
Minnesota also has statewide guidance
Minnesota publishes rules that apply to lakes across the state — 50 recommendations covering 24 species — in addition to anything listed for Lake Olson below.
Strictest statewide rule: Muskellunge — For children under 15 and people who are or may become pregnant: do not eat due to elevated Mercury.
What's safe to eat from Lake Olson
Black Bullhead
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Children under 15 and people who are or may become pregnant | For children under 15 and people who are or may become pregnant: limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-09-23
Black Crappie
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per week due to elevated PFOS. |
| Children under 15 and people who are or may become pregnant | For children under 15 and people who are or may become pregnant: limit to one meal per week due to elevated Mercury. |
Source: official advisory· updated 2026-09-23
Brown Bullhead
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Children under 15 and people who are or may become pregnant | For children under 15 and people who are or may become pregnant: limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-09-23
White Crappie
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to two meals per week due to elevated PFOS. |
| Children under 15 and people who are or may become pregnant | For children under 15 and people who are or may become pregnant: limit to one meal per week due to elevated Mercury. |
Source: official advisory· updated 2026-09-23
Yellow Bullhead
| Size | Who | Guidance |
|---|---|---|
| All sizes | General population | Limit to one meal per week due to elevated Mercury. |
| Children under 15 and people who are or may become pregnant | For children under 15 and people who are or may become pregnant: limit to one meal per month due to elevated Mercury. |
Source: official advisory· updated 2026-09-23
Is it legal to keep?
These rules are specific to Lake Olson. Always verify the current regulations before keeping a fish.
| Species | Size | Daily limit | Open season | Keep season |
|---|---|---|---|---|
| Largemouth Bass | — | 0 | Year-round | Same as open |
Official rules: Minnesota — Minnesota DNR
Getting on the water
- Boat ramp boat ramp 0.7 mi Directions
- Boat ramp boat ramp 1.2 mi Directions
- Silver Lake Boat Launch boat ramp 2.3 mi Directions
- Boat ramp boat ramp 3.4 mi Directions
- Boat ramp boat ramp 3.5 mi Directions
- Fishing pier fishing 3.7 mi Directions
Access points from OpenStreetMap contributors.