Question 1

How clean is Spring Fork Lake?

Accepted Answer

Spring Fork 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): 1.4 ft. Phosphorus: 160 µg/L. Chlorophyll-a (algae): 48.6 µg/L. Trophic State Index: 73.

Question 2

What is the water clarity of Spring Fork Lake?

Accepted Answer

Spring Fork Lake has a Secchi depth (water clarity) of 1.4 feet. That is poor clarity, indicating heavy algae or sediment.

Question 3

Does Spring Fork Lake have an algae problem?

Accepted Answer

Spring Fork Lake has a chlorophyll-a (algae) level of 48.6 µg/L. That is high — the lake is at meaningful risk of harmful algal bloom advisories in summer.

Question 4

Is Spring Fork Lake polluted?

Accepted Answer

Spring Fork 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.

How Clean Is Spring Fork Lake?

Cleanliness Snapshot

How does Spring Fork Lake compare?

More on Spring Fork Lake

Metric	Spring Fork Lake	Wisconsin avg
Overall Grade	F	C
Water Clarity (Secchi)	1.4 ft	—
Phosphorus	160 µg/L	<30 = clean
Chlorophyll-a (Algae)	48.6 µg/L	<10 = clean
Trophic State Index	73	<50 = clean