What is the water quality grade for Colchester Pond?

Colchester Pond in Chittenden County, Vermont received a water quality grade of B (Good). Water clarity: 8.9 ft visibility. Phosphorus: 17.2 µg/L. Chlorophyll-a (algae): 3.9 µg/L.

Is Colchester Pond safe to swim in?

Good for swimming, clear water with low algae levels. Colchester Pond has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 3.9 µg/L. Always check local health department advisories before swimming.

Chittenden County, Vermont

Colchester Pond

Grade BGood · 8.9 ft clarity

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Mesotrophic

Colchester Pond 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, Colchester Pond ranks #6 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

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 8.9 ft. Phosphorus level: 17.2 µg/L. Chlorophyll-a: 3.9 µg/L. Trophic State Index: 45.

Metric	Value	Grade
Water Clarity (Secchi Depth)	8.9 ft	C
Phosphorus	17.2 µg/L	A
Chlorophyll-a (Algae)	3.9 µg/L	A
Trophic State Index (TSI)	45	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Colchester Pond

Compare lakeside cabins, hotels, and vacation rentals near Colchester Pond in Chittenden County, Vermont — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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