What is the water quality grade for Indian Brook Reservoir?

Indian Brook Reservoir in Chittenden County, Vermont received a water quality grade of B (Good). Water clarity: 12.1 ft visibility. Phosphorus: 15.8 µg/L. Chlorophyll-a (algae): 5.4 µg/L.

Is Indian Brook Reservoir safe to swim in?

Good for swimming, clear water with low algae levels. Indian Brook Reservoir has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 5.4 µg/L. Always check local health department advisories before swimming.

Chittenden County, Vermont

Indian Brook Reservoir

Grade BGood · 12.1 ft clarity

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Mesotrophic

Indian Brook Reservoir is a mesotrophic lake in Chittenden County, Vermont. Water quality is graded B based on 3 sampling years through 2025. Compared to the 7 other monitored lakes in Chittenden County, Indian Brook Reservoir ranks #4 for water quality.

Source: EPA Water Quality Portal sampling records, Vermont DNR, last sampled 2025-08-31. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Good clarity, visible to about 12.1 ft. Phosphorus level: 15.8 µg/L. Chlorophyll-a: 5.4 µg/L. Trophic State Index: 44.

Metric	Value	Grade
Water Clarity (Secchi Depth)	12.1 ft	B
Phosphorus	15.8 µg/L	A
Chlorophyll-a (Algae)	5.4 µg/L	B
Trophic State Index (TSI)	44	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Indian Brook Reservoir

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