Chevans Lake Deep
Chevans Lake Deep in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.9 ft visibility. Phosphorus: 17.5 µg/L. Chlorophyll-a (algae): 4.6 µg/L.
- Clarity
- 1.9 ft
- Typical in August
- 68°F
- Trend
- → Stable
Next lake in Cook County
Why Chevans Lake Deep has no grade
We grade a lake only when its monitoring record clears the evidence bar: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Chevans Lake Deep, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Chevans Lake Deep is a lake in Cook County, Minnesota.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2023-10-02. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Chevans Lake Deep
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Very murky, less than 1.9 ft of visibility. Phosphorus level: 17.5 µg/L. Chlorophyll-a: 4.6 µg/L. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.9 ft | Not graded |
| Phosphorus | 17.5 µg/L | Not graded |
| Chlorophyll-a (Algae) | 4.6 µg/L | Not graded |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Chevans Lake Deep
Compare lakeside cabins, hotels, and vacation rentals near Chevans Lake Deep in Cook 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.
Top-rated places to stay near Chevans Lake Deep
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Water Temperature
Chevans Lake Deep typically sits around 68°F at the surface in August. Summer average is about 66°F. Usually warmest in Aug (about 68°F) and coldest in May (about 47°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 56 field readings (2011–2023) via the EPA Water Quality Portal. See the full Chevans Lake Deep water temperature breakdown →
Fishing Chevans Lake Deep
Water Quality Trend: → Stable
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | 0 m/yr | 2 |
Nearby Lakes in Cook County
Frequently asked questions about Chevans Lake Deep
What is the water quality grade for Chevans Lake Deep?
- Chevans Lake Deep in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1.9 ft visibility. Phosphorus: 17.5 µg/L. Chlorophyll-a (algae): 4.6 µg/L.
Is Chevans Lake Deep safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Chevans Lake Deep is not rated for water quality — its monitoring record does not meet the evidence bar. Algae concentration (chlorophyll-a) is 4.6 µg/L. Always check local health department advisories before swimming.
What is the water temperature of Chevans Lake Deep?
- Chevans Lake Deep typically sits around 68°F at the surface in August, from 56 EPA Water Quality Portal field readings (2011–2023). That is a typical value for the month, not a live reading.
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Where this data comes from
26 measurements from 1 monitoring station, 2021–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Grand Portage Reservation
GPC5_WQX26 samples · 2021–2023
Analytical methods
- 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.