Mt Maud Lake Inlet
Cook County, MinnesotaView mapDirections
Minnesota PCA publishes the water-quality measurements for Mt Maud Lake Inlet. Here is what has been measured.
- Limited data
Mt Maud Lake Inlet in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 3.4 ft visibility.
Mt Maud Lake Inlet is a lake in Cook County, Minnesota. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-09-25. 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 Mt Maud Lake Inlet 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 Mt Maud Lake Inlet
These are the measurements Minnesota PCA publishes for Mt Maud Lake Inlet, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.4 ft. TSI 60.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.4ft | 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. | 60 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Mt Maud Lake Inlet
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Mt Maud Lake Inlet typically sits around 52°F at the surface in October. Summer average is about 71°F. Usually warmest in Jun (about 73°F) and coldest in May (about 52°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (52°F) to its warmest (73°F).
Typical surface water temperature by month, from 28 field readings (2011–2025) via the EPA Water Quality Portal. See the full Mt Maud Lake Inlet water temperature breakdown →
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Stays near Mt Maud Lake Inlet
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Fishing Mt Maud Lake Inlet
Water quality readings over time
3 seasons of samples on record (2021–2025). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Phosphorus
Worsening+6.5 µg/L/yr2 years
Nearby Lakes in Cook County
Frequently asked questions about Mt Maud Lake Inlet
Where is Mt Maud Lake Inlet?
- Mt Maud Lake Inlet 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 Mt Maud Lake Inlet?
- Mt Maud Lake Inlet in Cook County, Minnesota has water-quality measurements published by Minnesota PCA, shown here as reported. Water clarity: 3.4 ft visibility.
Is Mt Maud Lake Inlet 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 Mt Maud Lake Inlet?
- Mt Maud Lake Inlet typically sits around 52°F at the surface in October, from 28 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
12 measurements from 1 monitoring station, 2021–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Grand Portage Reservation
GPC5_WQX12 samples · 2021–2025
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.