Lake Caonillas Water Level
Lago Caonillas · Utuado, Puerto Rico · operated by Puerto Rico Electric Power Authority (PREPA/AEE)
Water level
251.82 m
above mean sea level · 2026-09-22
SafetyAt 251.82 m, Lake Caonillas is above its seasonal norm — higher than 81.6% of all September days recorded since 1991.
Recorded range
224.95 – 254.23 m
Position in range
91.8%
Seasonal percentile
81.6%
Record since
1991
Official operating levels (PREPA)
Overflow
252.00 m
Safety
248.00 m
Observation
244.00 m
Adjustments
242.01 m
Control
235.00 m
Out of service
227.99 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.
The chart plots where the water level sits inside the range this reservoir has recorded since 1991 (224.95 m to 254.23 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
Dam and gauge
Design capacity
43.4 hm³
National Inventory of Dams
USGS gauge
50026140
Daily values, 15-minute source data
Municipality
Utuado
Central 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.