Fish Lake
Fish Lake in Becker County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 1 ft visibility. Phosphorus: 136 µg/L. Chlorophyll-a (algae): 103.7 µg/L.
- Clarity
- 1 ft
- Typical in August
- 73°F
- Mean depth
- ~10 ft est.
- Type
- Hypereutrophic
- Public access
- No
Grade F measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Fish Lake →
Next lake in Becker County
Fish Lake is a highly nutrient-loaded hypereutrophic lake in Becker County, Minnesota with an estimated average depth of about 10 feet. Water quality is graded F based on 2 sampling years through 2022. Limited fish-species data available. No public access — the lake is private or restricted. Compared to the 83 other monitored lakes in Becker County, Fish Lake ranks #81 for water quality.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2022-09-19. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom
Water Quality Grade: F (Algae-prone)
Very murky, less than 1 ft of visibility. Phosphorus level: 136 µg/L. Chlorophyll-a: 103.7 µg/L. Trophic State Index: 76.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 ft | Not graded |
| Phosphorus | 136 µg/L | Poor |
| Chlorophyll-a (Algae) | 103.7 µg/L | Poor |
| Trophic State Index (TSI) | 76 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Fish Lake
Compare lakeside cabins, hotels, and vacation rentals near Fish Lake in Becker 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Fish Lake are listed below.
Top-rated places to stay near Fish Lake
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Planning a whole trip? See where to stay at Minnesota’s top lakes →
Water Temperature
Fish Lake typically sits around 73°F at the surface in August. Summer average is about 71°F. Usually warmest in Jul (about 73°F) and coldest in Jun (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 39 field readings (2022–2022) via the EPA Water Quality Portal. See the full Fish Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~10 ft est. |
| Public Access | No |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Minnesota has not published bathymetry for Fish Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Fish Lake
County Ranking
Ranked #81 of 84 lakes in Becker County
Nearby Lakes With Higher Grades
Fish Lake holds Grade F. 3 nearby lakes hold higher nutrient-and-algae grades — useful for a swim day, not a reason to skip lodging here.
Nearby Lakes in Becker County
Frequently asked questions about Fish Lake
What is the water quality grade for Fish Lake?
- Fish Lake in Becker County, Minnesota has a water quality grade of F (Algae-prone). Water clarity: 1 ft visibility. Phosphorus: 136 µg/L. Chlorophyll-a (algae): 103.7 µg/L.
Is Fish Lake safe to swim in?
- Algae and nutrients are often high — check current advisories before swimming. Skip the water if you see scum or a paint-like bloom. Fish Lake has a water quality grade of F (Algae-prone). Algae concentration (chlorophyll-a) is 103.7 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Fish Lake?
- Fish Lake typically sits around 73°F at the surface in August, from 39 EPA Water Quality Portal field readings (2022–2022). That is a typical value for the month, not a live reading.
How deep is Fish Lake?
- No published bathymetric survey covers Fish Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 10 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Fish Lake across LakeGrade
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Where this data comes from
24 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Minnesota Pollution Control Agency - Ambient Surface Water
MNPCA24 samples · 2022
Analytical methods
- Field measurement/observation, generic method
- Phosphorus by Two Reagent Colorimetry
- 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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Lake details from Minnesota DNR LakeFinder