What is the water quality grade for Lake St. Catherine?

Lake St. Catherine in Rutland County, Vermont received a water quality grade of A (Excellent). Water clarity: 15.4 ft visibility. Phosphorus: 13.2 µg/L. Chlorophyll-a (algae): 2.7 µg/L.

Is Lake St. Catherine safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Lake St. Catherine has an overall water quality grade of A. Algae concentration (chlorophyll-a) is 2.7 µg/L. Always check local health department advisories before swimming.

Rutland County, Vermont

Lake St. Catherine

Grade AExcellent · 15.4 ft clarity

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Oligotrophic

Lake St. Catherine is a cold, clear oligotrophic lake in Rutland County, Vermont. Water quality is graded A based on 3 sampling years through 2025. Compared to the 29 other monitored lakes in Rutland County, Lake St. Catherine ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Vermont DNR, last sampled 2025-09-01. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

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Water Quality Grade: A, Excellent

Crystal clear, you can see 15.4 ft down. Phosphorus level: 13.2 µg/L. Chlorophyll-a: 2.7 µg/L. Trophic State Index: 40.

Metric	Value	Grade
Water Clarity (Secchi Depth)	15.4 ft	A
Phosphorus	13.2 µg/L	A
Chlorophyll-a (Algae)	2.7 µg/L	A
Trophic State Index (TSI)	40	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Lake St. Catherine

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