Colebrook River Lake
Colebrook River Lake in Northwest Hills County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 845 acres.
- Area
- 845 acres
- Public access
- Yes
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Why Colebrook River Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Colebrook River Lake, no water-quality sampling on record for this lake.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Colebrook River Lake is a 845-acre lake in Northwest Hills County, Connecticut. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Colebrook River Lake water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Colebrook River Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Colebrook River Lake
Compare lakeside cabins, hotels, and vacation rentals near Colebrook River Lake in Northwest Hills 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 Colebrook River Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 845 acres |
| Public Access | Yes |
No bathymetric survey has been published for Colebrook River Lake, so its depth is not documented here.
Recreation & Access
- Colebrook River LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Colebrook River Lake
Nearby Lakes in Northwest Hills County
Frequently asked questions about Colebrook River Lake
Where is Colebrook River Lake?
- Colebrook River Lake is a lake in Northwest Hills County, Connecticut. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Colebrook River Lake?
- Colebrook River Lake in Northwest Hills County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 845 acres.
Is Colebrook River Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Colebrook River Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Colebrook River Lake?
- Colebrook River Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Colebrook River Lake. Public access is listed as yes.
Explore Colebrook River Lake across LakeQuality
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Where this data comes from
Measurements for Colebrook River Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory