What is the water quality grade for Shadow Mountain Lake?

Shadow Mountain Lake in Grand County, Colorado received a water quality grade of B (Good). Water clarity: 7.8 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 5.1 µg/L.

Is Shadow Mountain Lake safe to swim in?

Good for swimming, clear water with low algae levels. Shadow Mountain Lake has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 5.1 µg/L. Always check local health department advisories before swimming.

Grand County, Colorado

Shadow Mountain Lake

Grade BGood · 7.8 ft clarity

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Mesotrophic

Shadow Mountain Lake is a mesotrophic lake in Grand County, Colorado. Water quality is graded B based on 3 sampling years through 2024. Compared to the 5 other monitored lakes in Grand County, Shadow Mountain Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, Colorado DNR, last sampled 2024-01-30. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.8 ft. Phosphorus level: 20 µg/L. Chlorophyll-a: 5.1 µg/L. Trophic State Index: 47.

Metric	Value	Grade
Water Clarity (Secchi Depth)	7.8 ft	C
Phosphorus	20 µg/L	B
Chlorophyll-a (Algae)	5.1 µg/L	B
Trophic State Index (TSI)	47	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Shadow Mountain Lake

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