Isanti County Lake Quality
Minnesota, 46 lakes, measured by Minnesota PCA
There are 46 monitored lakes in Isanti County. The mix is varied enough that the county-level average tells you the broad strokes, not the choose-this-cabin specifics. 17 of those lakes carry recent nutrient and algae readings. The county-level summary describes that subset, not every water body listed. For Isanti County the spread behind the average matters more than the average itself: a few nutrient-rich lakes among many clear ones produce the same figure as the inverse.
Most of the county's monitored lakes are shallow, under 50 feet, which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Horseshoe Lake has the lowest nutrient and algae readings in the county.
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Quick Answers for Isanti County
Planning a trip? Check special fishing regulations for Horseshoe Lake — or browse the full Minnesota regulations index.
Fishing in Isanti County
DNR Reports (40)
Minnesota DNR LakeFinder resources for lakes in Isanti County. browse all reports →
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — SpectacleFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — South StanchfieldFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — SkogmanFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — North StanchfieldFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — LoryFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — Little StanchfieldFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — KransFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — GreenFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — FrancisFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — FlorenceFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — FannieFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — ElmsFisheries Lake Survey · MN DNR LakeFinder
- —Fisheries Lake Survey — BlueFisheries Lake Survey · MN DNR LakeFinder
- —Aquatic Plant Report — Blue (1850)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — BlueFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — BluePublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Elms (1842)Aquatic Plant Report · MN DNR LakeFinder
- —Aquatic Plant Report — Fannie (1854)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — FannieFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FanniePublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Florence (1841)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — FlorenceFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FlorencePublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Francis (1848)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — FrancisFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — FrancisPublic Water Access Sites · MN DNR LakeFinder
- —Fish Stocking History — GreenFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — GreenPublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Little Stanchfield (1845)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — Little StanchfieldPublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Lory (1839)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — LoryPublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — North Stanchfield (1838)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — North StanchfieldFish Stocking History · MN DNR LakeFinder
- —Aquatic Plant Report — Skogman (1849)Aquatic Plant Report · MN DNR LakeFinder
- —Fish Stocking History — SkogmanFish Stocking History · MN DNR LakeFinder
- —Public Water Access Sites — SkogmanPublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — South Stanchfield (1837)Aquatic Plant Report · MN DNR LakeFinder
- —Public Water Access Sites — South StanchfieldPublic Water Access Sites · MN DNR LakeFinder
- —Aquatic Plant Report — Spectacle (1840)Aquatic Plant Report · MN DNR LakeFinder
All Lakes in Isanti County
46 lakes · 17 ranked on readings, 29 without enough sampling17 lakes ranked on readings · 29 without enough sampling, hidden
| # | Lake | Clarity | Phosphorus | Algae | Trophic | Max Depth | Access |
|---|---|---|---|---|---|---|---|
| 1 | Horseshoe LakeIsanti | 3.5 ft | 13 µg/L | 2.7 µg/L | No recent samples | No recent samples | Carry-in |
| 2 | Spectacle LakeIsanti | 13.8 ft | 11 µg/L | 2.2 µg/L | No recent samples | 51.5 ft | ✓ Public |
| 3 | Upper Birch LakeIsanti | 10.8 ft | 9.5 µg/L | 2.3 µg/L | No recent samples | No recent samples | Carry-in |
| 4 | Lower Birch LakeIsanti | 7.4 ft | 19 µg/L | 3.6 µg/L | No recent samples | No recent samples | Carry-in |
| 5 | Hoffman LakeIsanti | 3.7 ft | 15 µg/L | 3.6 µg/L | No recent samples | No recent samples | Carry-in |
| 6 | Horseleg LakeIsanti | 3.6 ft | 17 µg/L | 3 µg/L | No recent samples | No recent samples | Carry-in |
| 7 | Skogman LakeIsanti | 5.4 ft | 31 µg/L | 13.4 µg/L | No recent samples | 36 ft | ✓ Public |
| 8 | Fannie LakeIsanti | 6.9 ft | 35 µg/L | 9.3 µg/L | No recent samples | 33 ft | ✓ Public |
| 9 | Twin LakeIsanti | 2.5 ft | 78 µg/L | 16 µg/L | No recent samples | No recent samples | Carry-in |
| 10 | Elms LakeIsanti | 6.5 ft | 51.5 µg/L | 8.9 µg/L | No recent samples | 26 ft | Carry-in |
| 11 | Blue LakeIsanti | 8.9 ft | 44 µg/L | 21.4 µg/L | No recent samples | 31 ft | ✓ Public |
| 12 | Green LakeIsanti | 4.7 ft | 48 µg/L | 16.4 µg/L | No recent samples | 28 ft | ✓ Public |
| 13 | Lory LakeIsanti | 6 ft | 43 µg/L | 10.2 µg/L | No recent samples | 21 ft | ✓ Public |
| 14 | Little Stanchfield LakeIsanti | 3.5 ft | 122 µg/L | 25.4 µg/L | No recent samples | 12 ft | ✓ Public |
| 15 | Francis LakeIsanti | 2 ft | 159 µg/L | 56.1 µg/L | No recent samples | 7 ft | ✓ Public |
| 16 | South Stanchfield LakeIsanti | 2.5 ft | 119 µg/L | 32 µg/L | No recent samples | 17 ft | ✓ Public |
| 17 | North Stanchfield LakeIsanti | 2.8 ft | 190.5 µg/L | 54.7 µg/L | No recent samples | 11 ft | Carry-in |
| Florence LakeIsanti | 8.9 ft | No recent samples | No recent samples | No recent samples | 26 ft | ✓ Public | |
| Krans LakeIsanti | 1.5 ft | No recent samples | No recent samples | No recent samples | 31 ft | Carry-in | |
| Stratton LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Long LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Tamarack LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Hurley LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Grass LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Rice LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Marget LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Elizabeth LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Long LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Long LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | 14 ft | Not recorded | |
| Mud LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Upper Rice LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Seventeen LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Section LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | 3.3 ft | Not recorded | |
| Trollin LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Linderman LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Lindgren LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Krone LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Lesure Heath LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Williams LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Barton LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Baxter LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | 10 ft | Not recorded | |
| Tennyson LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Mud LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Stony LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| German LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | No recent samples | Not recorded | |
| Long LakeIsanti | No recent samples | No recent samples | No recent samples | No recent samples | 10 ft | ✓ Public |
NR = no nutrient or algae reading on record. The measurements are published as the authority reports them. Where the data comes from.
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Source: the Minnesota Pollution Control Agency and the Minnesota DNR. See data sources.