Opossum Lake
Cumberland County, Pennsylvania56 acresView mapDirections
PA DEP publishes the water-quality measurements for Opossum Lake. Here is what has been measured.
- Impaired · Nutrients (phosphorus, nitrogen)
- Public access
- Limited data
Opossum Lake in Cumberland County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 20.1 µg/L. Surface area: 56 acres.
Opossum Lake is a 56-acre lake in Cumberland County, Pennsylvania. Limited fish-species data available. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, PA DEP, last sampled 2017-12-12. Methodology: how these readings are compared.
What Opossum Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch3 documented ramps
Swimming conditions
Readings onlyLimited data
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Opossum Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Opossum Lake is safe to swim in today is a call for the Pennsylvania Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Opossum Lake
These are the measurements PA DEP publishes for Opossum Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 28 µg/L. Chlorophyll-a 20.1 µg/L.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 28µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 20.1µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
Ask about Opossum Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
56 acres
Shoreline
3.6 mi
Public access
Yes
Listed by PA DEP
No bathymetric survey has been published for Opossum Lake, so its depth is not documented here.
Recreation & Access
- Opossum Lake BL #3Public
- Opossum Lake BL #2Public
- Opossum Lake BL #1Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Opossum Lake
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Fishing Opossum Lake
EPA Impairment Status
Opossum Lake 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 PA-LRP-02050305001685 · Official waterbody report
Nearby Lakes in Cumberland County
Frequently asked questions about Opossum Lake
Where is Opossum Lake?
- Opossum Lake is a lake in Cumberland County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.
What is the water quality of Opossum Lake?
- Opossum Lake in Cumberland County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 28 µg/L. Chlorophyll-a (algae): 20.1 µg/L. Surface area: 56 acres.
Is Opossum Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Opossum Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Are there boat ramps on Opossum Lake?
- Opossum Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Opossum Lake BL #3, Opossum Lake BL #2, Opossum Lake BL #1. Public access is listed as yes.
Can I fish at Opossum Lake?
- Opossum Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Pennsylvania's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
Measurements for Opossum Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.
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
Named boat-access points from the USGS National Boat Ramps inventory