Grassy Sprain Reservoir
Grassy Sprain Reservoir in Westchester County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 149 acres.
- Area
- 149 acres
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Why Grassy Sprain 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 Grassy Sprain 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 NYSDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Grassy Sprain Reservoir is a 149-acre lake in Westchester County, New York.
Source: EPA Water Quality Portal sampling records, NYSDEC, 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 Grassy Sprain 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 Grassy Sprain Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Grassy Sprain Reservoir in Westchester County, New York — 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 Grassy Sprain Reservoir
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 149 acres |
No bathymetric survey has been published for Grassy Sprain Reservoir, so its depth is not documented here.
Fishing Grassy Sprain Reservoir
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Frequently asked questions about Grassy Sprain Reservoir
Where is Grassy Sprain Reservoir?
- Grassy Sprain Reservoir is a lake in Westchester County, New York. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Grassy Sprain Reservoir?
- Grassy Sprain Reservoir in Westchester County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 149 acres.
Is Grassy Sprain Reservoir safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Grassy Sprain 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 Grassy Sprain Reservoir come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.