Deep River Reservoir
Deep River Reservoir in Southeastern Connecticut County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 236 acres.
- Area
- 236 acres
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Why Deep River Reservoir 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 Deep River Reservoir, 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.
Deep River Reservoir is a 236-acre lake in Southeastern Connecticut County, Connecticut.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Deep River Reservoir
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 Deep River Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Deep River Reservoir in Southeastern Connecticut 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 Deep River Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 236 acres |
No bathymetric survey has been published for Deep River Reservoir, so its depth is not documented here.
Fishing Deep River Reservoir
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Frequently asked questions about Deep River Reservoir
Where is Deep River Reservoir?
- Deep River Reservoir is a lake in Southeastern Connecticut 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 Deep River Reservoir?
- Deep River Reservoir in Southeastern Connecticut County, Connecticut is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 236 acres.
Is Deep River Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Deep River Reservoir is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Deep River Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.