Question 1

How clean is Fin And Feather Lake?

Accepted Answer

Fin And Feather Lake has very poor water quality and a high algae bloom risk. It received a water quality grade of F (Very Poor) based on EPA monitoring data. Water clarity (Secchi depth): 2.3 ft. Chlorophyll-a (algae): 42 µg/L. Trophic State Index: 66.

Question 2

What is the water clarity of Fin And Feather Lake?

Accepted Answer

Fin And Feather Lake has a Secchi depth (water clarity) of 2.3 feet. That is poor clarity, indicating heavy algae or sediment.

Question 3

Does Fin And Feather Lake have an algae problem?

Accepted Answer

Fin And Feather Lake has a chlorophyll-a (algae) level of 42 µg/L. That is high — the lake is at meaningful risk of harmful algal bloom advisories in summer.

Question 4

Is Fin And Feather Lake polluted?

Accepted Answer

Fin And Feather Lake shows pollution indicators consistent with nutrient over-enrichment (typically phosphorus from agricultural runoff, fertilizer, or failing septic systems). Its grade of F reflects elevated nutrient and algae levels.

Metric	Fin And Feather Lake	Wisconsin avg
Overall Grade	F	D
Water Clarity (Secchi)	2.3 ft	—
Chlorophyll-a (Algae)	42 µg/L	<10 = clean
Trophic State Index	66	<50 = clean

How Clean Is Fin And Feather Lake?

Cleanliness Snapshot

How does Fin And Feather Lake compare?

More on Fin And Feather Lake