Clark Canyon Reservoir is a mesotrophic lake in Beaverhead County, Montana. Water quality is graded C based on 3 sampling years through 2018. Compared to the 4 other monitored lakes in Beaverhead County, Clark Canyon Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2018-10-11. Grade methodology: LakeGrade methodology.
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 7.4 ft. Phosphorus level: 30 µg/L. Chlorophyll-a: 5.4 µg/L. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.4 ft | C |
| Phosphorus | 30 µg/L | C |
| Chlorophyll-a (Algae) | 5.4 µg/L | B |
| Trophic State Index (TSI) | 50 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Clark Canyon Reservoir
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Fishing Clark Canyon Reservoir
Location
County Ranking
Ranked #3 of 5 lakes in Beaverhead County
Nearby Lakes in Beaverhead County
Explore Clark Canyon Reservoir across LakeGrade
More Montana Lake Rankings
Other Grade C Lakes in Montana
Mesotrophic Lakes in Montana
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: 2018-10-11
Monitoring stations: 9