Lake Río Blanco Water Level
Lago Río Blanco · Naguabo, Puerto Rico · operated by Puerto Rico Aqueduct and Sewer Authority (PRASA/AAA)
Water level
28.61 m
above mean sea level · 2026-11-08
At 28.61 m, Lake Río Blanco is close to its seasonal norm for November, sitting above 42.7% of November days recorded since 2010.
Recorded range
22.15 – 28.95 m
Position in range
95%
Seasonal percentile
42.7%
Record since
2010
No operating thresholds are published in an open format for this reservoir, so no official status is shown. The measured level and its seasonal standing are shown instead.
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 2010 (22.15 m to 28.95 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
4.74 hm³
National Inventory of Dams
USGS gauge
50076800
Daily values, 15-minute source data
Municipality
Naguabo
East Puerto Rico
Primary use
water supply
PRASA / AAA
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.