What is the water quality grade for Morrison Reservoir?

Morrison Reservoir in Platte County, Wyoming received a water quality grade of A (Excellent). Water clarity: 14.4 ft visibility. Phosphorus: 10 µg/L.

Is Morrison Reservoir safe to swim in?

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

Platte County, Wyoming

Morrison Reservoir

Grade AExcellent · 14.4 ft clarity

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Oligotrophic

Morrison Reservoir is a cold, clear oligotrophic lake in Platte County, Wyoming. Water quality is graded A based on 2 sampling years through 2019. Compared to the 14 other monitored lakes in Platte County, Morrison Reservoir ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Wyoming DNR, last sampled 2019-09-09. 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 14.4 ft. Phosphorus level: 10 µg/L. Trophic State Index: 38.

Metric	Value	Grade
Water Clarity (Secchi Depth)	14.4 ft	B
Phosphorus	10 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	38	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Morrison Reservoir

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