Calderwood Lake is a cold, clear oligotrophic lake in Graham County, North Carolina. Water quality is graded A based on 2 sampling years through 2024. Compared to the 3 other monitored lakes in Graham County, Calderwood Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, North Carolina DNR, last sampled 2024-11-05. Grade methodology: LakeGrade methodology.
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Swimming Safety
Excellent for swimming, crystal clear water with minimal algae
Water Quality Grade: A, Excellent
Crystal clear, you can see 16.4 ft down. Chlorophyll-a: 1.3 µg/L. Trophic State Index: 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 16.4 ft | A |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | 1.3 µg/L | A |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
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Fishing Calderwood Lake
Location
County Ranking
Ranked #1 of 4 lakes in Graham County
Nearby Lakes in Graham County
Explore Calderwood Lake across LakeGrade
More North Carolina Lake Rankings
Top 25 by overall water quality score
Top 25 by Secchi water clarity
Grade A/B + low algae filter
Panfish-rich, public access
Full state directory
Other Grade A Lakes in North Carolina
Oligotrophic Lakes in North Carolina
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-11-05
Monitoring stations: 1