What is the water quality grade for Blue Mesa Reservoir?

Blue Mesa Reservoir in Gunnison County, Colorado received a water quality grade of B (Good). Water clarity: 11.5 ft visibility. Phosphorus: 35 µg/L. Chlorophyll-a (algae): 4.9 µg/L.

Is Blue Mesa Reservoir safe to swim in?

Good for swimming, clear water with low algae levels. Blue Mesa Reservoir has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 4.9 µg/L. Always check local health department advisories before swimming.

Gunnison County, Colorado

Blue Mesa Reservoir

Grade BGood · 11.5 ft clarity

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Mesotrophic

Blue Mesa Reservoir is a mesotrophic lake in Gunnison County, Colorado. Water quality is graded B based on 3 sampling years through 2023. Compared to the 1 other monitored lakes in Gunnison County, Blue Mesa Reservoir ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Colorado DNR, last sampled 2023-09-28. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 11.5 ft. Phosphorus level: 35 µg/L. Chlorophyll-a: 4.9 µg/L. Trophic State Index: 48.

Metric	Value	Grade
Water Clarity (Secchi Depth)	11.5 ft	B
Phosphorus	35 µg/L	C
Chlorophyll-a (Algae)	4.9 µg/L	A
Trophic State Index (TSI)	48	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Blue Mesa Reservoir

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