Lake George
Keweenaw County, Michigan9 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
- Mesotrophic
- #9 of 11 in the county
Lake George in Keweenaw County, Michigan has a water quality grade of B (Good). Water clarity: 8 ft visibility. Phosphorus: 9.9 µg/L. Surface area: 9.2 acres.
- Clarity
- 8 ft
- Typical in September
- 69°F
- Area
- 9 acres
- Type
- Mesotrophic
- Phosphorus
- 9.9 µg/L
- Trend
- ↓ Declining
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Watch Lake George’s letter
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Lake George is a 9-acre mesotrophic lake in Keweenaw County, Michigan. Water quality is graded B based on 1 sampling years through 2024. Overall water quality is declining over recent sampling years. The lake supports 9 documented fish species including Bluegill, Bluntnose minnow, and Iowa darter. Compared to the 10 other monitored lakes in Keweenaw County, Lake George ranks #9 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2024-09-03. Grade methodology: LakeQuality methodology.
What Lake George is good for
From access and monitoring records, not editorial picks.
- Fishing9 species recorded
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Moderate clarity, visible to about 8 ft. Phosphorus 9.9 µg/L. TSI 42. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | Not graded |
| Phosphorus | 9.9 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Water Temperature
Lake George typically sits around 69°F at the surface in September. Summer average is about 69°F. Usually warmest in Jul (about 73°F) and coldest in Jun (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 380 field readings (2010–2024) via the EPA Water Quality Portal. See the full Lake George water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 9 acres |
No bathymetric survey has been published for Lake George, so its depth is not documented here.
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Lake George
Water Quality Trend: ↓ Declining
Based on 9 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.004 m/yr | 9 |
| Phosphorus | ↓ Declining | +2.15 µg/L/yr | 8 |
County Ranking
Ranked #9 of 11 lakes in Keweenaw County
Nearby Lakes in Keweenaw County
Frequently asked questions about Lake George
Where is Lake George?
- Lake George is a lake in Keweenaw County, Michigan. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake George?
- Lake George in Keweenaw County, Michigan has a water quality grade of B (Good). Water clarity: 8 ft visibility. Phosphorus: 9.9 µg/L. Surface area: 9.2 acres.
Is Lake George safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Lake George?
- Lake George typically sits around 69°F at the surface in September, from 380 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
What fish are in Lake George?
- Fish species found in Lake George include Bluegill, Bluntnose minnow, Iowa darter, Largemouth bass, Pumpkinseed, Redear sunfish, Rock bass, Smallmouth bass, Yellow perch. Lake George is located in Keweenaw County, Michigan.
Explore Lake George across LakeQuality
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Moderate nutrients, good water quality
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Where this data comes from
39 measurements from 1 monitoring station, 2016–2024. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- National Park Service Water Resources Division
11NPSWRD_WQX39 samples · 2016–2024
Analytical methods
- Secchi Disk
- Alkaline Persulfate Digestion for Total N and P in Water
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.