Platte County Lake Quality

Wyoming, 15 lakes, average grade C (Fair)

Platte County's 15 graded lakes fall in the moderate-density bracket for {{stateName}}. The county-level average smooths over real differences — a single agricultural watershed near the southwest corner can pull the average down even if the rest of the county runs clean. The county average is C — the middle of the rubric, with one or two lakes pulling the average up or down depending on year.

Most of the county's monitored lakes are shallow — under 50 feet — which means wind keeps the water column mixed all summer and sediment-bound phosphorus releases back into the surface layer whenever the bottom is disturbed. Morrison Reservoir (A) is the cleanest in the county.

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Quick Answers for Platte County

Cleanest lakes in Platte County →Cleanest lakes in Wyoming →Safest swimming lakes in Wyoming →

Planning a trip? Check special fishing regulations for Morrison Reservoir — or check the official Wyoming fishing regulations.

All Lakes in Platte County

Rank	Lake	Grade	Clarity	Phosphorus
1	Morrison Reservoir	A	14.4 ft	10 µg/L
2	Glendo Reservoir Lacustrine Embayment	B	7.4 ft	20 µg/L
3	Glendo Reservoir Lacustrine Littoral	B	6.6 ft	20 µg/L
4	Rock Lake	B	3.8 ft	12.5 µg/L
5	Wheatland Reservoir	B	8.9 ft	20 µg/L
6	Jordan Reservoir	B	5 ft	10 µg/L
7	Glendo Reservoir Transitional Littoral	C	3.7 ft	20 µg/L
8	Glendo Reservoir Lacustrine Pelagic	C	5.2 ft	20 µg/L
9	Greyrocks Reservoir	C	5.4 ft	20 µg/L
10	Guernsey Reservoir	C	4.9 ft	20 µg/L
11	Glendo Reservoir Transitional Pelagic	C	5.3 ft	30 µg/L
12	Glendo Reservoir Riverine Embayment	D	2.7 ft	50 µg/L
13	Glendo Reservoir Riverine Pelagic	D	1.4 ft	60 µg/L
14	Glendo Reservoir Riverine Littoral	F	1.1 ft	130 µg/L
15	Festo Lake	F	0.8 ft	159.5 µg/L