Lake Guayo Water Level
Lago Guayo · Lares, Puerto Rico · operated by Puerto Rico Electric Power Authority (PREPA/AEE)
Water level
445.1 m
above mean sea level · 2026-11-08
OverflowAt 445.1 m, Lake Guayo is close to its seasonal norm for November, sitting above 70.4% of November days recorded since 1990.
Recorded range
431.47 – 448.33 m
Position in range
80.8%
Seasonal percentile
70.4%
Record since
1990
Official operating levels (PREPA)
Overflow
445.01 m
Safety
441.96 m
Observation
440.13 m
Adjustments
438.30 m
Control
436.78 m
Out of service
435.56 m
These are the thresholds the Puerto Rico Electric Power Authority publishes for this reservoir. They, not a storage percentage, are what trigger operational adjustments and rationing decisions on the island.
Drought context
Puerto Rico drought →U.S. Drought Monitor
Noneno drought
Week of 3 November 2026
Drought figures describe the ground around the reservoir, not its storage. Sources: U.S. Drought Monitor.
The chart plots where the water level sits inside the range this reservoir has recorded since 1990 (431.47 m to 448.33 m). It is a level position, not a share of storage capacity — Puerto Rico does not publish reservoir volume.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
On the map
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Dam and gauge
Design capacity
21.46 hm³
National Inventory of Dams
USGS gauge
50141500
Daily values, 15-minute source data
Municipality
Lares
West Puerto Rico
Primary use
hydropower
PREPA / AEE
Design capacity is the volume the dam was built to impound, from the US Army Corps of Engineers' National Inventory of Dams. It describes the size of the reservoir — it is not used to compute a fill percentage, because the elevation-to-volume curve needed for that is not published for Puerto Rico.