Helmer_nelson Pond Middle
Cook County, MinnesotaView mapDirections
Minnesota PCA publishes the water-quality measurements for Helmer_nelson Pond Middle. Here is what has been measured.
- Limited data
Helmer_nelson Pond Middle in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.5 ft visibility.
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. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Helmer_nelson Pond Middle is safe to swim in today is a call for the Minnesota Pollution Control Agency and the Minnesota DNR and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Helmer_nelson Pond Middle
These are the measurements Minnesota PCA publishes for Helmer_nelson Pond Middle, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.5 ft of visibility. TSI 64.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Helmer_nelson Pond Middle
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Helmer_nelson Pond Middle typically sits around 56°F at the surface in October. 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.
Column height runs from this lake’s coldest month (47°F) to its warmest (74°F).
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 →
Stays via Stay22
Stays 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
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Minnesota’s top lakes →
Follow Helmer_nelson Pond Middle’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Helmer_nelson Pond Middle
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2025).
Water clarity
Worsening3 years
Phosphorus
Improving-8.73 µg/L/yr5 years
Chlorophyll-a
Worsening+4.56 µg/L/yr4 years
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. Its water-quality measurements are published by Minnesota PCA and shown on this page as reported.
What is the water quality of Helmer_nelson Pond Middle?
- Helmer_nelson Pond Middle in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 2.5 ft visibility.
Is Helmer_nelson Pond Middle safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Helmer_nelson Pond Middle?
- Helmer_nelson Pond Middle typically sits around 56°F at the surface in October, from 39 EPA Water Quality Portal field readings (2011–2025). That is a typical value for the month, not a live reading.
Explore Helmer_nelson Pond Middle across LakeQuality
Fish species and the cleanest lakes across Minnesota
Fish species and best lakes in Cook County
Species activity outlook by water temperature and season
Where to stay at Minnesota's top lakes, each with its readings
Lakes in the Lake Superior Basin (MN+WI), ranked by water quality
Minnesota's cleanest lakes, ranked on agency measurements
More lakes in Minnesota
State Parks Near Helmer_nelson Pond Middle
Other Lakes in Minnesota
Eutrophic Lakes in Minnesota
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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.