Green Holly Pond
Green Holly Pond in St. Mary's County, Maryland is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
- Area
- 31 acres
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Why Green Holly Pond 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 Green Holly Pond, 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.
Green Holly Pond is a 31-acre lake in St. Mary's County, Maryland.
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 Green Holly Pond
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 Green Holly Pond
Compare lakeside cabins, hotels, and vacation rentals near Green Holly Pond in St. Mary's County, Maryland — 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 Green Holly Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 31 acres |
No bathymetric survey has been published for Green Holly Pond, so its depth is not documented here.
Fishing Green Holly Pond
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Frequently asked questions about Green Holly Pond
Where is Green Holly Pond?
- Green Holly Pond is a lake in St. Mary's County, Maryland. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Green Holly Pond?
- Green Holly Pond in St. Mary's County, Maryland is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 31 acres.
Is Green Holly Pond safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Green Holly Pond is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Green Holly Pond across LakeQuality
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Where this data comes from
Measurements for Green Holly Pond come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.