Andover Lake
Tolland County, Connecticut166 acresView mapDirections
CT DEEP publishes the water-quality measurements for Andover Lake. Here is what has been measured.
- Limited data
Andover Lake in Tolland County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 10.2 ft visibility. Surface area: 166 acres.
Andover Lake is a 166-acre lake in Tolland County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-10-05. Methodology: how these readings are compared.
What Andover Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10.2 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Andover Lake is safe to swim in today is a call for the Connecticut Department of Energy and Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Andover Lake
These are the measurements CT DEEP publishes for Andover Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 10.2 ft. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Andover Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
166 acres
No bathymetric survey has been published for Andover Lake, so its depth is not documented here.
Stays via Stay22
Stays near Andover Lake
Compare lakeside cabins, hotels, and vacation rentals near Andover Lake in Tolland County, Connecticut — 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.
Top-rated places to stay near Andover Lake
Prices for Oct 9–11, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Follow Andover Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Andover Lake
Reservoir Info (USACE NID)
Andover Lake is a man-made reservoir impounded by the Andover Lake Dam (completed 1926), built primarily for recreation on the Cheney Brook; earth-type dam, 18 ft tall and 590 ft long.
- Surface area
- 166 ac
- Normal storage
- 0 ac-ft
- Max storage
- 1,460 ac-ft
- Drainage area
- 3.96 sq mi
- Hazard class
- Significant
- Owner
- Andover Lake Management Association
Source: USACE National Inventory of Dams, NID ID CT00624 · Operator website
Nearby Lakes in Tolland County
Frequently asked questions about Andover Lake
Where is Andover Lake?
- Andover Lake is a lake in Tolland County, Connecticut. Its water-quality measurements are published by CT DEEP and shown on this page as reported.
What is the water quality of Andover Lake?
- Andover Lake in Tolland County, Connecticut has water-quality measurements published by CT DEEP, shown here as reported. Water clarity: 10.2 ft visibility. Surface area: 166 acres.
Is Andover Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Andover Lake across LakeQuality
More lakes in Connecticut
Other Lakes in Connecticut
Mesotrophic Lakes in Connecticut
Where this data comes from
5 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- North American Lake Management Society
NALMS5 samples · 2020
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.