Mt Maud Lake Inlet
Mt Maud Lake Inlet in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.4 ft visibility.
- Clarity
- 3.4 ft
- Typical in July
- 68°F
- Trend
- → Stable
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Why Mt Maud Lake Inlet 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 Mt Maud Lake Inlet, 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.
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. Grade methodology: LakeQuality 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 Mt Maud Lake Inlet
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 3.4 ft. Trophic State Index: 60.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 60 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Mt Maud Lake Inlet
Compare lakeside cabins, hotels, and vacation rentals near Mt Maud Lake Inlet 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.
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Water Temperature
Mt Maud Lake Inlet typically sits around 68°F at the surface in July. 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.
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 →
Fishing Mt Maud Lake Inlet
Water Quality Trend: → Stable
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.05 m/yr | 3 |
| Phosphorus | ↓ Declining | +6.5 µg/L/yr | 2 |
Graded lakes near Mt Maud Lake Inlet
Mt Maud Lake Inlet has no grade, but these lakes within a short drive do.
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. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Mt Maud Lake Inlet?
- Mt Maud Lake Inlet in Cook County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.4 ft visibility.
Is Mt Maud Lake Inlet safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Mt Maud Lake Inlet 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 Mt Maud Lake Inlet?
- Mt Maud Lake Inlet typically sits around 68°F at the surface in July, 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)
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.