Greenbelt Lake
Greenbelt Lake in Prince George's County, Maryland is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.9 ft visibility.
- Clarity
- 3.9 ft
Why Greenbelt Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Greenbelt Lake, the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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.
Greenbelt Lake is a lake in Prince George's County, Maryland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-06-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Greenbelt Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 3.9 ft. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Greenbelt Lake
Compare lakeside cabins, hotels, and vacation rentals near Greenbelt Lake in Prince George'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.
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Fishing Greenbelt Lake
Nearby Lakes in Prince George's County
Frequently asked questions about Greenbelt Lake
What is the water quality grade for Greenbelt Lake?
- Greenbelt Lake in Prince George's County, Maryland is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.9 ft visibility.
Is Greenbelt Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Greenbelt Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Greenbelt Lake across LakeGrade
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Where this data comes from
20 measurements from 5 monitoring stations, 2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples20 samples · 2024
Monitoring station identifiers (5)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2024-06-17
Monitoring stations: 5