Allegheny Reservoir
Warren County, Pennsylvania12,222 acresView mapDirections
PA DEP publishes the water-quality measurements for Allegheny Reservoir. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- 131 ft max depth
- Public access
- Limited data
Allegheny Reservoir in Warren County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 9.8 µg/L. Maximum depth: 131.2 ft. Surface area: 12222 acres.
Allegheny Reservoir is a 12,222-acre productive, nutrient-rich eutrophic lake in Warren County, Pennsylvania with a maximum depth of 131 feet (49-foot average). Limited fish-species data available. Public access is available with 2 public boat landings.
Source: EPA Water Quality Portal sampling records, PA DEP, last sampled 2019-11-05. Methodology: how these readings are compared.
What Allegheny Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
- Camping4 public campgrounds nearby
- Deep water131.2 ft surveyed max depth
- Big water12,222 acres
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. Allegheny Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
Whether Allegheny Reservoir 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 Allegheny Reservoir
These are the measurements PA DEP publishes for Allegheny Reservoir, 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 13 µg/L. Chlorophyll-a 9.8 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 | 13µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 9.8µg/L | Poor GoodFairPoor |
High nutrients, frequent algae, reduced clarity
Ask about Allegheny Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
131.2 ft
Average depth
49.2 ft
Surface area
12,222 acres
Shoreline
150.8 mi
Public access
Yes
Listed by PA DEP
Recreation & Access
- Webbs FerryPublic
- Willow BayPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Public campgrounds near Allegheny Reservoir
- Hooks Brook Boat To0.7 km
- Willow Bay Rec Area3.0 km
- Willow Bay3.2 kmReserve
- Handsome Lake Boat To4.8 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Stays via Stay22
Stays near Allegheny Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Allegheny Reservoir in Warren 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 Allegheny Reservoir are listed below.
Top-rated places to stay near Allegheny Reservoir
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Fishing Allegheny Reservoir
EPA Impairment Status
Allegheny Reservoir 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: Fish consumption.
Source: EPA ATTAINS assessment unit PA-LRP-05010001002698 · Official waterbody report
Nearby Lakes in Warren County
Frequently asked questions about Allegheny Reservoir
Where is Allegheny Reservoir?
- Allegheny Reservoir is a lake in Warren County, Pennsylvania. Its water-quality measurements are published by PA DEP and shown on this page as reported.
What is the water quality of Allegheny Reservoir?
- Allegheny Reservoir in Warren County, Pennsylvania has water-quality measurements published by PA DEP, shown here as reported. Phosphorus: 13 µg/L. Chlorophyll-a (algae): 9.8 µg/L. Maximum depth: 131.2 ft. Surface area: 12222 acres.
Is Allegheny Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Allegheny Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for mercury. Check local advisories before you swim.
How deep is Allegheny Reservoir?
- Allegheny Reservoir has a maximum depth of 131.2 feet and an average depth of 49.2 feet. The lake covers 12222 acres.
Are there boat ramps on Allegheny Reservoir?
- Allegheny Reservoir has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Webbs Ferry, Willow Bay. Public access is listed as yes.
Can I fish at Allegheny Reservoir?
- Allegheny Reservoir has 2 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.
Are there campgrounds on Allegheny Reservoir?
- Allegheny Reservoir has 4 public campgrounds from USGS The National Map within 5 km, including Hooks Brook Boat To, Willow Bay Rec Area, Willow Bay, Handsome Lake Boat To. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
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Where this data comes from
Measurements for Allegheny Reservoir 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
Public campgrounds from USGS The National Map Structures, within about 3 miles