Reservoir · Pennsylvania · United States · USACE CWMS
Allegheny Reservoir, PA
102.0% full
Capacity
706.79 hm³
Volume stored
721 hm³
Coordinates
41.838°N, 79.004°W
Last updated
2026-06-12
Current fill
102.0%vs 7 days ago
0.0%stable
vs 1 year ago
-3.0%year-over-year
7-day trend
→stable
Data source: USACE CWMS — US Army Corps of Engineers — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-06-12.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 41.838, -79.004 · Open in Google Maps
About Allegheny Reservoir, PA
As of June 12, 2026, Allegheny Reservoir, PA is filled to 102.0% of its total capacity, holding roughly 721 hm³ of water out of a maximum 707 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has held broadly steady (+0.0 pts), and it is 3.0 points below its level on the same date a year earlier.
Across the readings we hold for Allegheny Reservoir, PA — 325 data points between June 13, 2021 and June 12, 2026 — the level has ranged from a low of 53.9% (February 17, 2026) to a high of 105.0% (July 11, 2021). On average the reservoir is fullest around April and at its lowest around January.
It is operated by USACE primarily for multiple purposes. It lies within the Pennsylvania basin at 41.838°N, 79.004°W.
Key facts
- Current fill level
- 102.0%
- Water stored
- 721 hm³
- Total capacity
- 707 hm³
- 7-day change
- No change
- Year-on-year
- ▼ 3.0 pts
- Primary use
- Multipurpose
- River basin
- Pennsylvania
- Operator
- USACE
- Coordinates
- 41.838°N, 79.004°W
- Last updated
- June 12, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 12 Jun 2026 | 102.0% | 721 |
| 11 Jun 2026 | 102.0% | 721 |
| 10 Jun 2026 | 101.8% | 720 |
| 9 Jun 2026 | 101.9% | 720 |
| 8 Jun 2026 | 102.1% | 722 |
| 7 Jun 2026 | 102.5% | 725 |
| 6 Jun 2026 | 102.6% | 725 |
| 5 Jun 2026 | 102.7% | 726 |
| 4 Jun 2026 | 102.7% | 726 |
| 3 Jun 2026 | 102.8% | 727 |
| 2 Jun 2026 | 103.0% | 728 |
| 1 Jun 2026 | 103.4% | 731 |
Frequently asked questions
What is the current water level of Allegheny Reservoir, PA?
As of June 12, 2026, Allegheny Reservoir, PA is at 102.0% of its capacity, holding approximately 721 hm³ of water, according to USACE CWMS (US Army Corps of Engineers) data.
Is Allegheny Reservoir, PA reservoir full?
Allegheny Reservoir, PA is essentially full, sitting at 102.0% of capacity as of June 12, 2026.
Is the water level at Allegheny Reservoir, PA rising or falling?
The level at Allegheny Reservoir, PA has been broadly stable over the latest week on record (0.0 points).
How much water can Allegheny Reservoir, PA hold?
Allegheny Reservoir, PA has a total capacity of 707 hm³.
Where is Allegheny Reservoir, PA reservoir located?
Allegheny Reservoir, PA is located in Pennsylvania, United States, within the Pennsylvania basin (coordinates 41.838°N, 79.004°W).
What is Allegheny Reservoir, PA used for?
Allegheny Reservoir, PA is used primarily for multiple purposes, and is managed by USACE.