Helmer_nelson Pond Middle
Helmer_nelson Pond Middle in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility.
- Clarity
- 2.5 ft
- Typical in August
- 70°F
- Trend
- ↓ Declining
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Why Helmer_nelson Pond Middle has no grade
We grade a lake only when the monitoring record supports a letter: 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 Helmer_nelson Pond Middle, 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, but not 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.
Helmer_nelson Pond Middle is a lake in Cook County, Minnesota. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2021-09-21. Grade methodology: LakeQuality methodology.
Watch Helmer_nelson Pond Middle water quality
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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 Helmer_nelson Pond Middle
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.5 ft of visibility. Trophic State Index: 64.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 64 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Helmer_nelson Pond Middle
Compare lakeside cabins, hotels, and vacation rentals near Helmer_nelson Pond Middle 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 Helmer_nelson Pond Middle
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Water Temperature
Helmer_nelson Pond Middle typically sits around 70°F at the surface in August. Summer average is about 72°F. Usually warmest in Jul (about 74°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 39 field readings (2011–2025) via the EPA Water Quality Portal. See the full Helmer_nelson Pond Middle water temperature breakdown →
Fishing Helmer_nelson Pond Middle
Water Quality Trend: ↓ Declining
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -14.114 m/yr | 3 |
| Phosphorus | ↑ Improving | -8.73 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +4.56 µg/L/yr | 4 |
Graded lakes near Helmer_nelson Pond Middle
Helmer_nelson Pond Middle has no grade, but these lakes within a short drive do.
Nearby Lakes in Cook County
Frequently asked questions about Helmer_nelson Pond Middle
Where is Helmer_nelson Pond Middle?
- Helmer_nelson Pond Middle is a lake in Cook County, Minnesota. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Helmer_nelson Pond Middle?
- Helmer_nelson Pond Middle in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.5 ft visibility.
Is Helmer_nelson Pond Middle safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Helmer_nelson Pond Middle is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Helmer_nelson Pond Middle?
- Helmer_nelson Pond Middle typically sits around 70°F at the surface in August, from 39 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
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Where this data comes from
11 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Grand Portage Reservation
GPC5_WQX11 samples · 2021
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.