Lake Sebago
Lake Sebago in Rockland County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 298 acres.
- Area
- 298 acres
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Why Lake Sebago 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 Lake Sebago, 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.
Lake Sebago is a 298-acre lake in Rockland 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 Lake Sebago
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 Lake Sebago
Compare lakeside cabins, hotels, and vacation rentals near Lake Sebago in Rockland 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 Lake Sebago
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 298 acres |
No bathymetric survey has been published for Lake Sebago, so its depth is not documented here.
Fishing Lake Sebago
Nearby Lakes in Rockland County
Frequently asked questions about Lake Sebago
Where is Lake Sebago?
- Lake Sebago is a lake in Rockland 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 Lake Sebago?
- Lake Sebago in Rockland County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 298 acres.
Is Lake Sebago safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lake Sebago 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 Lake Sebago come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.