Canonsburg Lake
Washington County, Pennsylvania59 acresView mapDirections
PA DEP publishes the water-quality measurements for Canonsburg Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- Public access
- Limited data
Canonsburg Lake in Washington County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 75 µg/L. Chlorophyll-a (algae): 35.4 µg/L. Surface area: 59 acres.
Canonsburg Lake is a 59-acre highly nutrient-loaded hypereutrophic lake in Washington County, Pennsylvania. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, PA DEP, last sampled 2021-11-17. Methodology: how these readings are compared.
What Canonsburg Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
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. Canonsburg Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Canonsburg 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 Canonsburg Lake
These are the measurements PA DEP publishes for Canonsburg 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 75 µg/L. Chlorophyll-a 35.4 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 | 75µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 35.4µg/L | Poor GoodFairPoor |
Very high nutrients, dense algae, poor clarity
Ask about Canonsburg Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
59 acres
Shoreline
3.3 mi
Public access
Yes
Listed by PA DEP
No bathymetric survey has been published for Canonsburg Lake, so its depth is not documented here.
Recreation & Access
- Canonsburg LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Canonsburg Lake
Compare lakeside cabins, hotels, and vacation rentals near Canonsburg Lake in Washington County, Pennsylvania — 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Canonsburg Lake are listed below.
Top-rated places to stay near Canonsburg Lake
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Fishing Canonsburg Lake
EPA Impairment Status
Canonsburg Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit PA-LRP-05030101010002 · Official waterbody report
Nearby Lakes in Washington County
Frequently asked questions about Canonsburg Lake
Where is Canonsburg Lake?
- Canonsburg Lake is a lake in Washington County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.
What is the water quality of Canonsburg Lake?
- Canonsburg Lake in Washington County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 75 µg/L. Chlorophyll-a (algae): 35.4 µg/L. Surface area: 59 acres.
Is Canonsburg Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Canonsburg Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Are there boat ramps on Canonsburg Lake?
- Canonsburg Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Canonsburg Lake. Public access is listed as yes.
Can I fish at Canonsburg Lake?
- Canonsburg Lake has 1 documented boat landing 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 Canonsburg 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