Cash Lake
Prince George's County, Maryland49 acresView mapDirections
MDE publishes the water-quality measurements for Cash Lake. Here is what has been measured.
- Limited data
Cash Lake in Prince George's County, Maryland has water-quality measurements published by MDE, shown here as reported. Water clarity: 1.3 ft visibility. Surface area: 49 acres.
Cash Lake is a 49-acre lake in Prince George's County, Maryland.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-06-17. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Cash Lake is safe to swim in today is a call for the Maryland Department of the Environment and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Cash Lake
These are the measurements MDE publishes for Cash Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 1.3 ft of visibility. TSI 73.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 73 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Cash Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
49 acres
No bathymetric survey has been published for Cash Lake, so its depth is not documented here.
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Fishing Cash Lake
Reservoir Info (USACE NID)
Cash Lake is a man-made reservoir impounded by the Cash Lake Dam (completed 1939), built primarily for fish and wildlife pond on the Patuxent-Tr; earth-type dam, 20 ft tall and 771 ft long.
- Surface area
- 49 ac
- Normal storage
- 163 ac-ft
- Max storage
- 584 ac-ft
- Drainage area
- 2.43 sq mi
- Hazard class
- High
- Owner
- US FISH AND WILDLIFE SERVICE
Source: USACE National Inventory of Dams, NID ID MD00013 · Operator website
Nearby Lakes in Prince George's County
Frequently asked questions about Cash Lake
Where is Cash Lake?
- Cash Lake is a lake in Prince George's County, Maryland. Its water-quality measurements are published by MDE and shown on this page as reported.
What is the water quality of Cash Lake?
- Cash Lake in Prince George's County, Maryland has water-quality measurements published by MDE, shown here as reported. Water clarity: 1.3 ft visibility. Surface area: 49 acres.
Is Cash Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Cash Lake across LakeQuality
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Where this data comes from
19 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 samples19 samples · 2024
Monitoring station identifiers (5)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.