Question 1

How clean is Stanley Reservoir?

Accepted Answer

Stanley Reservoir has poor water quality, with elevated phosphorus and algae. It received a water quality grade of D (Poor) based on EPA monitoring data. Water clarity (Secchi depth): 1.1 ft. Chlorophyll-a (algae): 19.5 µg/L. Trophic State Index: 68.

Question 2

What is the water clarity of Stanley Reservoir?

Accepted Answer

Stanley Reservoir has a Secchi depth (water clarity) of 1.1 feet. That is poor clarity, indicating heavy algae or sediment.

Question 3

Does Stanley Reservoir have an algae problem?

Accepted Answer

Stanley Reservoir has a chlorophyll-a (algae) level of 19.5 µg/L. That is moderate — visible algae is possible but bloom risk is limited.

Question 4

Is Stanley Reservoir polluted?

Accepted Answer

Stanley Reservoir shows pollution indicators consistent with nutrient over-enrichment (typically phosphorus from agricultural runoff, fertilizer, or failing septic systems). Its grade of D reflects elevated nutrient and algae levels.

Metric	Stanley Reservoir	Wisconsin avg
Overall Grade	D	C
Water Clarity (Secchi)	1.1 ft	—
Chlorophyll-a (Algae)	19.5 µg/L	<10 = clean
Trophic State Index	68	<50 = clean

How Clean Is Stanley Reservoir?

Cleanliness Snapshot

How does Stanley Reservoir compare?

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