State · United States · USGS · BOR · USACE · CDEC
Pennsylvania
61% average fill
Measured
13
Volume stored
970 hm³
Measured capacity
1,591 hm³
Critical
7
Low level
1
Below month average
10 of 11
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Drought Monitor · 27 October 2026
Weekly map · area in each categoryDrought status
0.6%
of the area in drought (D1 or worse)
Worst category: D0 abnormally dry
unchanged on the week
Severe or worse (D2+)
0.0%
Extreme or worse (D3+)
0.0%
DSCI
140–500
People in drought
55,000
Reservoirs (reservoirs.earth)
61.0% full13 tracked
Reservoirs on drought ground
0 of 13
As of the 27 October 2026 U.S. Drought Monitor map, 0.6% of Pennsylvania was in drought (D1 or worse). The 13 reservoirs we track in Pennsylvania were 61.0% full on their latest readings. 0 of 13 tracked reservoir sites sit inside the drought area.
The Drought Monitor maps where conditions are dry this week — rainfall, soil moisture, streamflow — not how much water is stored. Reservoir storage lags it by months, so a region can be in drought with full reservoirs, or out of drought with empty ones. Source: droughtmonitor.unl.edu. The U.S. Drought Monitor is jointly produced by the National Drought Mitigation Center at the University of Nebraska-Lincoln, the United States Department of Agriculture, the National Oceanic and Atmospheric Administration and the National Aeronautics and Space Administration. Map courtesy of NDMC.
Reservoirs
Sorted by capacityAllegheny Reservoir
Updated 2026-10-30· 90% of month avg· D0
Youghiogheny River Lake
Updated 2026-10-30· 99% of month avg
Conemaugh River Lake
criticalUpdated 2026-10-30· 63% of month avg
Union City Dam
criticalUpdated 2026-10-30· 0% of month avg· D0
Lake Lynn Outflow
Updated 2026-10-30
Shenango River Lake
Updated 2026-10-30· 100% of month avg
East Branch Clarion Lake
Updated 2026-10-30· 95% of month avg
Tionesta Lake
criticalUpdated 2026-10-30· 88% of month avg· D0
Crooked Creek Lake
criticalUpdated 2026-10-30· 89% of month avg
Mahoning Creek Lake
criticalUpdated 2026-10-30· 73% of month avg
Loyalhanna Lake
criticalUpdated 2026-10-30· 80% of month avg
Seneca Power Upper Reservoir
criticalUpdated 2026-10-30· 45% of month avg· D0
Woodcock Creek Lake
lowUpdated 2026-10-30· D0
Storage from official US gauges (USGS, USACE, Bureau of Reclamation, CDEC) and, in Texas, the Texas Water Development Board. Fill % uses design capacity from the National Inventory of Dams where available; Water Data for Texas lakes use that board's conservation capacity; a few sites without a match fall back to the 5-year maximum. "% of month avg" compares the current fill with the reservoir’s own average for this calendar month over its readings on record. D0–D4 is the U.S. Drought Monitor category of the ground at the reservoir’s coordinates on the latest weekly map — local conditions, not storage.
About reservoirs in Pennsylvania
As of October 30, 2026, the reservoirs we track across Pennsylvania that report live levels hold roughly 970 hm³ of water — about 61.0% of their combined capacity. Taken together, Pennsylvania's reservoirs are within their normal operating range.
Across the region, 7 reservoirs are at critically low levels and 1 is low. Youghiogheny River Lake is the fullest at 99.0%, while Union City Dam is the lowest at 0.0%.
Over the most recent week on record, 6 reservoirs fell across Pennsylvania.
Storage figures for Pennsylvania come from USGS · USACE · BOR · CDEC; the most recent reading is from October 30, 2026. Each reservoir below links to its own page with full history and seasonal context.
Pennsylvania at a glance
- Reservoirs tracked
- 13
- Average fill
- 61.0%
- Water stored
- 970 hm³
- Combined capacity
- 1,591 hm³
- At critically low levels
- 7
- Fullest
- Youghiogheny River Lake (99.0%)
- Lowest
- Union City Dam (0.0%)
- Last updated
- October 30, 2026