Kroon Lake
Kroon Lake in Chisago County, Minnesota has a water quality grade of A (Excellent). Water clarity: 5.9 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 5.3 µg/L. Maximum depth: 30 ft. Surface area: 193.18 acres.
- Clarity
- 5.9 ft
- Typical in August
- 74°F
- Max depth
- 30 ft
- Area
- 193 acres
- Type
- Mesotrophic
- Trend
- ↑ Improving
- Public access
- Yes
- Ice-out
- Apr 14
Next lake in Chisago County
Kroon Lake is a 193-acre mesotrophic lake in Chisago County, Minnesota with a maximum depth of 30 feet (5-foot average). Water quality is graded A based on 2 sampling years through 2025. Overall water quality is improving over recent sampling years. The lake supports 13 documented fish species including black bullhead, black crappie, and bluegill. Public access is available with 1 public boat landing. Compared to the 29 other monitored lakes in Chisago County, Kroon Lake ranks #7 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-19. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A (Excellent)
Murky, only visible to about 5.9 ft. Phosphorus level: 22 µg/L. Chlorophyll-a: 5.3 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.9 ft | Not graded |
| Phosphorus | 22 µg/L | Good |
| Chlorophyll-a (Algae) | 5.3 µg/L | Good |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Kroon Lake
Compare lakeside cabins, hotels, and vacation rentals near Kroon Lake in Chisago County, Minnesota — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
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Water Temperature
Kroon Lake typically sits around 74°F at the surface in August. Summer average is about 74°F. Usually warmest in Jul (about 77°F) and coldest in May (about 61°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 45 field readings (2011–2025) via the EPA Water Quality Portal. See the full Kroon Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 30 ft |
| Average Depth | 5 ft |
| Surface Area | 193 acres |
| Shoreline Length | 2.4 mi |
| Littoral Zone | 78% |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Kroon LakePublic
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Kroon Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
DNR Fisheries Survey Summary
10 surveys on file from MN DNR Fisheries. Most recent: 2025-09-05 (Targeted Survey).
Top Species by Catch Rate
| Species | Avg CPUE | Avg Weight |
|---|---|---|
| Bluegill | 51.77 | 0.13 lb |
| Largemouth Bass | 15.84 | 0.96 lb |
| Black Crappie | 7.92 | 0.2 lb |
| Bluntnose Minnow | 6.99 | — |
| Northern Pike | 5.00 | 2.81 lb |
| Pumpkinseed | 4.76 | 0.2 lb |
CPUE = catch per unit effort, averaged across surveys (excludes juvenile shoreline seining). Higher CPUE = more abundant in standardized sampling.
Length Distributions
Number of fish caught at each inch class in the most recent survey that recorded lengths. Red dashed line marks an approximate trophy threshold for that species.
Bluegill
Largemouth Bass
Black Crappie
Northern Pike
From the 2025-09-05 survey
A targeted survey of the nearshore fish community was conducted by Hinckley fisheries staff on Kroon Lake on September 5, 2025. Nearshore sampling captured 16 species of fish: Banded Kilifish, Black Crappie, Bluegill, Bluntnose Minnow, Central Mudminnow, Golden Shiner, Green Sunfish, Hybrid Sunfish, Iowa Darter,…
DNR Reports & Resources
Minnesota DNR LakeFinder publishes lake survey, fish stocking, water access, and aquatic plant data for Kroon Lake. 2 reports on file.
These links open on the official state DNR websites (Wisconsin DNR survey PDFs · Minnesota DNR LakeFinder).
- —Fisheries Lake Survey — KroonFisheries Lake Survey · MN DNR LakeFinder
- —Public Water Access Sites — KroonPublic Water Access Sites · MN DNR LakeFinder
Water Quality Trend: ↑ Improving
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.041 m/yr | 6 |
| Phosphorus | ↑ Improving | -4.22 µg/L/yr | 6 |
| Chlorophyll-a | ↑ Improving | -4.49 µg/L/yr | 6 |
Ice Season
Historical ice data from Minnesota DNR (4 observations).
| Earliest | Latest | |
|---|---|---|
| Ice-Out | 2015-03-31 (2015) | 2014-04-26 (2014) |
Most recent ice-out: 2022-04-14
EPA Impairment Status
Kroon Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MN13-0013-00 · Official waterbody report
County Ranking
Ranked #7 of 30 lakes in Chisago County
Nearby Lakes in Chisago County
Frequently asked questions about Kroon Lake
What is the water quality grade for Kroon Lake?
- Kroon Lake in Chisago County, Minnesota has a water quality grade of A (Excellent). Water clarity: 5.9 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 5.3 µg/L. Maximum depth: 30 ft. Surface area: 193.18 acres.
Is Kroon Lake safe to swim in?
- Excellent for swimming, crystal clear water with minimal algae. Kroon Lake has a water quality grade of A (Excellent). Algae concentration (chlorophyll-a) is 5.3 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Kroon Lake?
- Kroon Lake typically sits around 74°F at the surface in August, from 45 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
How deep is Kroon Lake?
- Kroon Lake has a maximum depth of 30 feet and an average depth of 5 feet. The lake covers 193.18 acres.
What fish are in Kroon Lake?
- Fish species found in Kroon Lake include black bullhead, black crappie, bluegill, bowfin (dogfish), brown bullhead, green sunfish, hybrid sunfish, largemouth bass, northern pike, pumpkinseed, walleye, yellow bullhead, yellow perch. Kroon Lake is located in Chisago County, Minnesota.
When does Kroon Lake thaw?
- Kroon Lake typically has ice-out around Apr 14.
Are there boat ramps on Kroon Lake?
- Kroon Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Kroon Lake. Public access is listed as yes.
Explore Kroon Lake across LakeGrade
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Where this data comes from
87 measurements from 1 monitoring station, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA87 samples · 2020–2025
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder
Named boat-access points from the USGS National Boat Ramps inventory
Ice data from Minnesota DNR Climate