Allen Pond
Prince George's County, Maryland10 acresView mapDirections
MDE publishes the water-quality measurements for Allen Pond. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Allen Pond in Prince George's County, Maryland has water-quality measurements published by MDE, shown here as reported. Water clarity: 2.1 ft visibility. Surface area: 9.5 acres.
Allen Pond is a 10-acre lake in Prince George's County, Maryland. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-10-18. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Allen Pond is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Allen Pond 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 Allen Pond
These are the measurements MDE publishes for Allen Pond, 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 2.1 ft of visibility. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | 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. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Allen Pond
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
10 acres
No bathymetric survey has been published for Allen Pond, so its depth is not documented here.
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Fishing Allen Pond
Water quality readings over time
2 seasons of samples on record (2021–2022). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Reservoir Info (USACE NID)
Allen Pond is a man-made reservoir impounded by the Allen Pond (Nottinghill Drive) (completed 1972), built primarily for recreation on the Collington Branch-TR; earth-type dam, 16 ft tall and 250 ft long.
- Surface area
- 9.5 ac
- Normal storage
- 35 ac-ft
- Max storage
- 119 ac-ft
- Drainage area
- 0.2 sq mi
- Hazard class
- Low
- Owner
- City of Bowie
Source: USACE National Inventory of Dams, NID ID MD00129 · Operator website
EPA Impairment Status
Allen Pond is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life.
Source: EPA ATTAINS assessment unit MD-021311030927-Allen_Pond · Official waterbody report
Nearby Lakes in Prince George's County
Frequently asked questions about Allen Pond
Where is Allen Pond?
- Allen Pond 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 Allen Pond?
- Allen Pond in Prince George's County, Maryland has water-quality measurements published by MDE, shown here as reported. Water clarity: 2.1 ft visibility. Surface area: 9.5 acres.
Is Allen Pond safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Allen Pond is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
30 measurements from 1 monitoring station, 2021–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples30 samples · 2021–2022
Monitoring station identifiers (1)
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database