Question 1

How clean is Otter Creek Lake?

Accepted Answer

Otter Creek Lake 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): 1.3 ft. Chlorophyll-a (algae): 24 µg/L. Trophic State Index: 67.

Question 2

What is the water clarity of Otter Creek Lake?

Accepted Answer

Otter Creek Lake has a Secchi depth (water clarity) of 1.3 feet. That is poor clarity, indicating heavy algae or sediment.

Question 3

Does Otter Creek Lake have an algae problem?

Accepted Answer

Otter Creek Lake has a chlorophyll-a (algae) level of 24 µg/L. That is elevated — visible blooms are possible during warm, calm weather.

Question 4

Is Otter Creek Lake polluted?

Accepted Answer

Otter Creek Lake 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	Otter Creek Lake	Wisconsin avg
Overall Grade	D	D
Water Clarity (Secchi)	1.3 ft	—
Chlorophyll-a (Algae)	24 µg/L	<10 = clean
Trophic State Index	67	<50 = clean

How Clean Is Otter Creek Lake?

Cleanliness Snapshot

How does Otter Creek Lake compare?

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