Lake Toa Vaca Water Level
Lago Toa Vaca · Villalba, Puerto Rico · operated by Puerto Rico Aqueduct and Sewer Authority (PRASA/AAA)
Water level
148.31 m
above mean sea level · 2026-11-08
At 148.31 m, Lake Toa Vaca is close to its seasonal norm for November, sitting above 35.3% of November days recorded since 1997.
Recorded range
19.4 – 164.5 m
Position in range
88.8%
Seasonal percentile
35.3%
Record since
1997
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
D1Moderate 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 1997 (19.4 m to 164.5 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
68.94 hm³
National Inventory of Dams
USGS gauge
50111210
Daily values, 15-minute source data
Municipality
Villalba
South 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.