Portaferry Lake
Portaferry Lake in St. Lawrence County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 78 acres.
- Area
- 78 acres
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Why Portaferry 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 Portaferry 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 NYSDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Portaferry Lake is a 78-acre lake in St. Lawrence 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 Portaferry 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 Portaferry Lake
Compare lakeside cabins, hotels, and vacation rentals near Portaferry Lake in St. Lawrence 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 Portaferry Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 78 acres |
No bathymetric survey has been published for Portaferry Lake, so its depth is not documented here.
Fishing Portaferry Lake
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Frequently asked questions about Portaferry Lake
Where is Portaferry Lake?
- Portaferry Lake is a lake in St. Lawrence 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 Portaferry Lake?
- Portaferry Lake in St. Lawrence County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 78 acres.
Is Portaferry Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Portaferry Lake 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 Portaferry Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.