Swift County Lake Quality
Minnesota, 3 lakes, average grade C (Fair)
Only 3 lakes in Swift County carry an active grade. The county-level summary is therefore representative of those specific lakes, not necessarily of every water body in the county. Swift County averages to a C. The distribution behind that average matters more than the letter: a few stressed lakes versus many decent ones can produce the same average as the inverse.
The county's lakes lean shallow, which makes the grades sensitive to wind, sediment-resuspension, and any nutrient inputs from the watershed. The cleanest lake on the books is Hassel Lake (C); the most-stressed is Hassel Lake (C).
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Quick Answers for Swift County
Planning a trip? Check special fishing regulations for Hassel Lake — or browse the full Minnesota regulations index.
DNR Reports (5)
Minnesota DNR LakeFinder resources for lakes in Swift County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — CampFisheries Lake Survey · MN DNR LakeFinder
- —Fish Stocking History — CampFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — CampPublic Water Access Sites · MN DNR LakeFinder
- —Fish Stocking History — HasselFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — HasselPublic Water Access Sites · MN DNR LakeFinder
All Lakes in Swift County
3 lakes · 1 graded, 2 not rated1 graded lake · 2 not rated, hidden
| # | Lake | Grade | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|---|
| 1 | CHassel LakeSwift | C | 1.6 ft | 47.5 µg/L | 7.1 µg/L | No recent samples | No recent samples | ✓ Public |
| NRUnnamed LakeSwift | NR | 0.7 ft | 224 µg/L | 106 µg/L | No recent samples | No recent samples | ✓ Public | |
| NRCamp LakeSwift | NR | 5 ft | No recent samples | No recent samples | No recent samples | 26 ft | ✓ Public |
NR = not rated: the monitoring record does not meet the evidence bar for a grade. That is EPA Integrated Reporting Category 3 (insufficient information), not a failing grade. How grading works.
Lake Match
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Six questions — swimming, fishing, quiet, cabins, drive time — and a shortlist of graded lakes that fit, with the water quality behind each one.
Other Counties in Minnesota
See how Swift County stacks up in the national county water-quality rankings, or browse the full directory of graded lakes across all 39 states and 2 Canadian provinces.
Source: EPA National Aquatic Resource Surveys, 2026.