Carraízo
Trujillo Alto
37.40m
122.71 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.40 m above Control
68%Of operating range
24 hours
-0.05m fell
7 days
-0.41m fell
30 days
-1.26m fell
Data as of August 23, 2026 · 19 of 19 reservoirs reporting
Showing 19 of 19 reservoirs
Operational adjustments
La Plata
Comerío
45.34m
148.75 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.44 m above Operational adjustments
72%Of operating range
24 hours
-0.07m fell
7 days
-0.53m fell
30 days
-2.32m fell
Cidra
Cidra
400.10m
1,312.67 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
1.73 m above Control
61%Of operating range
24 hours
-0.01m fell
7 days
-0.07m fell
30 days
-0.28m fell
Toa Vaca
Villalba
147.26m
483.14 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.26 m above Observation
59%Of operating range
24 hours
-0.02m fell
7 days
-0.16m fell
30 days
-0.66m fell
Río Blanco
Naguabo
24.67m
80.94 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.42 m above Operational adjustments
53%Of operating range
24 hours
-0.07m fell
7 days
-0.40m fell
30 days
-2.02m fell
Fajardo
Fajardo
46.76m
153.41 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
2.26 m above Operational adjustments
65%Of operating range
24 hours
-0.06m fell
7 days
-0.53m fell
30 days
-1.94m fell
Carite
Guayama
541.79m
1,777.51 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.63 m above Observation
89%Of operating range
24 hours
-0.02m fell
7 days
-0.13m fell
30 days
-0.49m fell
Patillas
Patillas
63.46m
208.19 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
1.28 m above Observation
80%Of operating range
24 hours
-0.05m fell
7 days
-0.22m fell
30 days
-0.72m fell
El Guineo
Orocovis
901.40m
2,957.36 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
2.24 m above Observation
90%Of operating range
24 hours
-0.05m fell
7 days
-1.01m fell
30 days
-1.02m fell
Matrullas
Orocovis
733.11m
2,405.23 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.07 m above Observation
64%Of operating range
24 hours
0.00m no change
7 days
+0.01m rose
30 days
+0.20m rose
Guayabal
Juana Díaz
102.52m
336.35 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.72 m above Operational adjustments
74%Of operating range
24 hours
+0.02m rose
7 days
+0.15m rose
30 days
-0.31m fell
Garzas
Adjuntas
735.98m
2,414.63 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
2.94 m above Observation
99%Of operating range
24 hours
+0.03m rose
7 days
-0.07m fell
30 days
+0.09m rose
Guayo
Lares
442.23m
1,450.90 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.27 m above Observation
66%Of operating range
24 hours
+0.07m rose
7 days
-1.14m fell
30 days
+0.31m rose
Lucchetti
Yauco
171.54m
562.79 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.85 m above Observation
73%Of operating range
24 hours
-0.08m fell
7 days
+0.94m rose
30 days
-0.95m fell
Loco
Yauco
69.86m
229.21 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.37 m above Observation
92%Of operating range
24 hours
-0.01m fell
7 days
+0.02m rose
30 days
+0.07m rose
Dos Bocas
Arecibo
88.43m
290.14 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
0.34 m above Observation
79%Of operating range
24 hours
-0.11m fell
7 days
-0.72m fell
30 days
-0.84m fell
Caonillas
Utuado
251.12m
823.89 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
3.12 m above Observation
95%Of operating range
24 hours
+0.01m rose
7 days
+0.11m rose
30 days
+0.02m rose
Guajataca
Quebradillas
195.93m
642.81 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
1.93 m above Observation
95%Of operating range
24 hours
-0.02m fell
7 days
-0.04m fell
30 days
+0.14m rose
Cerrillos
Ponce
167.54m
549.68 ft
Data as of August 23, 2026 · Reading taken at 5:00 AM · 8 h ago
6.64 m above Observation
81%Of operating range
24 hours
-0.06m fell
7 days
-0.38m fell
30 days
-1.49m fell
AAA alert phases
- Overflow — At capacity; the excess leaves over the spillway.
- Safety — Normal operating level.
- Observation — Below the safety mark; under monitoring.
- Operational adjustments — AAA reduces withdrawal to stretch the reserve.
- Control — Critical level.
- Out of service — Below the point of reliable withdrawal.
How we read the data
Every figure on this portal is the 5:00 AM AST reading from the USGS gauge, every day, at every reservoir. AAA's daily bulletin is drawn at 4:55 AM and carries the freshest reading that had arrived by press time; the gauges transmit once an hour, and the 5:00 AM reading is published around 5:57 AM. On days when levels move quickly the two figures can therefore differ by about a centimetre. Each is correct for its own cut-off. Ours holds the same 24-hour interval every day, which is what makes our day-over-day changes directly comparable to one another.
We read the same USGS gauges that underpin the bulletin. The alert phases (Overflow, Safety, Observation, Operational adjustments, Control) are the thresholds AAA publishes for each reservoir; AAA prints them in Spanish, as Desborde, Seguridad, Observación, Ajustes and Control.
Source
Data: U.S. Geological Survey (USGS)
Provisional data
Provisional data: values are preliminary, have not been reviewed or approved by the U.S. Geological Survey, and are subject to revision or removal as the record is finalized. Do not use them for decisions involving personal or public safety, or property.
Daily reservoir level bulletin: Autoridad de Acueductos y Alcantarillados de Puerto Rico.
This portal is not an official channel of the Autoridad de Acueductos y Alcantarillados. For service notices, consult AAA.