What is the water quality grade for Granite Springs Reservoir?

Granite Springs Reservoir in Laramie County, Wyoming received a water quality grade of A (Excellent). Water clarity: 11.8 ft visibility. Phosphorus: 10.3 µg/L.

Is Granite Springs Reservoir safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Granite Springs Reservoir has an overall water quality grade of A. Always check local health department advisories before swimming.

Laramie County, Wyoming

Granite Springs Reservoir

Grade AExcellent · 11.8 ft clarity

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Oligotrophic

Granite Springs Reservoir is a cold, clear oligotrophic lake in Laramie County, Wyoming. Water quality is graded A based on 2 sampling years through 2018. Compared to the 8 other monitored lakes in Laramie County, Granite Springs Reservoir ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Wyoming DNR, last sampled 2018-09-06. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Good clarity, visible to about 11.8 ft. Phosphorus level: 10.3 µg/L. Trophic State Index: 40.

Metric	Value	Grade
Water Clarity (Secchi Depth)	11.8 ft	B
Phosphorus	10.3 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	40	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Granite Springs Reservoir

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