Deadwood Reservoir is a cold, clear oligotrophic lake in Valley County, Idaho. Water quality is graded A based on 3 sampling years through 2021. Compared to the 14 other monitored lakes in Valley County, Deadwood Reservoir ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, Idaho DNR, last sampled 2021-08-04. 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 17.2 ft down. Phosphorus level: 14 µg/L. Chlorophyll-a: 1.7 µg/L. Trophic State Index: 38.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 17.2 ft | A |
| Phosphorus | 14 µg/L | A |
| Chlorophyll-a (Algae) | 1.7 µg/L | A |
| Trophic State Index (TSI) | 38 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near Deadwood Reservoir
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Fishing Deadwood Reservoir
Location
County Ranking
Ranked #3 of 15 lakes in Valley County
Nearby Lakes in Valley County
Explore Deadwood Reservoir across LakeGrade
More Idaho Lake Rankings
Other Grade A Lakes in Idaho
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: 2021-08-04
Monitoring stations: 1