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Reservoirs

Levels for the 19 reservoirs on AAA's daily bulletin

El Guineo

Orocovis

Safety

901.40m

2,957.36 ft

2.24 m above Observation

Data as of August 23, 2026 · Reading taken at 5:00 AM

Compared with normal

1.25 m above normal for this date

A ±7-day window around August 23, 2026, this reservoir's own most recent reading.

Percentile 57 across 38 years of record.

Rank 322 of 561 readings from these dates. Rank 1 is the lowest.

The rank counts individual readings, not years.

Most recent year lower on this date: 2025.

Median
900.16 m
Minimum
891.93 m1990
Maximum
902.62 m2011
90th percentile
902.44 m

Level over time

Resolution follows the range: daily up to a year, weekly at five years, monthly across the whole record.

El Guineo: level from July 25, 2026 to August 23, 2026, a net fall of 1.02 m.

August 23, 2026: 901.40 m.

Hover the chart or use the arrow keys to read a point.

From July 25, 2026 to August 23, 2026. Minimum 901.40 m, maximum 902.44 m.

The vertical scale runs from 901.00 m to 902.50 m and does not start at zero: these are metres above sea level.

The dashed lines are the alert bounds AAA publishes today. The record keeps no history of those bounds, so we do not know whether they were the same in the past.

Today the reservoir is in Safety.

4 bounds fall outside this chart’s scale.

El Guineo: level from July 25, 2026 to August 23, 2026, a net fall of 1.02 m.
Datem
July 25, 2026902.42
July 26, 2026902.42
July 27, 2026902.43
July 28, 2026902.43
July 29, 2026902.43
July 30, 2026902.43
July 31, 2026902.42
August 1, 2026902.43
August 2, 2026902.42
August 3, 2026902.43
August 4, 2026902.43
August 5, 2026902.44
August 6, 2026902.42
August 7, 2026902.42
August 8, 2026902.40
August 9, 2026902.40
August 10, 2026902.40
August 11, 2026902.41
August 12, 2026902.42
August 13, 2026902.43
August 14, 2026902.42
August 15, 2026902.42
August 16, 2026902.42
August 17, 2026902.41
August 18, 2026902.40
August 19, 2026902.33
August 20, 2026902.08
August 21, 2026901.77
August 22, 2026901.46
August 23, 2026901.40

Projection

Disabled

This portal does not publish projections yet. Saying when a reservoir would reach its next phase is a claim about the future of a great many people's water, and before publishing one we want the rule for when it may and may not be made written down.

Every August 23 in the record

Compare another date

Hover the dots or use the arrow keys.

21 years of the 39 with a reading on August 23 were below the most recent level.

From 1988 to 2026.

The dashed line is this reservoir’s most recent level: 901.40 m on August 23, 2026.

The vertical scale runs from 890.00 m to 905.00 m and does not start at zero: these are metres above sea level.

Years with no reading on this date are not in the record and are left as empty space on the axis.

Years below the most recent level are marked with a filled dot.

This counts years. The rank in the block above counts readings.

21 years of the 39 with a reading on August 23 were below the most recent level.
Every August 23 in the recordm
1988893.21
1989893.21
1990892.14
1991900.61
1992900.26
1993895.58
1994893.06
1995896.62
1996896.78
1997894.71
1998902.42
1999897.78
2000896.33
2001896.45
2002902.14
2003894.05
2004899.48
2005902.45
2006893.46
2007897.24
2008895.53
2009899.78
2010902.41
2011902.62
2012901.76
2013902.05
2014901.49
2015898.15
2016902.42
2017902.42
2018902.43
2019902.42
2020902.47
2021900.42
2022902.46
2023902.43
2024902.44
2025901.71
2026901.40

When it has been in each phase

Hover the bands or use the arrow keys.

Each band is one run in one phase, since January 1, 2020.

The axis is calendar time, from January 1, 2020 to August 23, 2026. Stretches with no bulletin are left blank.

Current run

4 days in Safety, since August 20, 2026.

The longest run in Safety on record: 147 days, from November 9, 1997 to April 5, 1998.

Counts bulletin days, not calendar days.

Each band is one run in one phase, since January 1, 2020.
PhaseFromToBulletin days
OverflowJanuary 1, 2020January 17, 202017
SafetyJanuary 18, 2020January 26, 20209
OverflowJanuary 27, 2020February 20, 202025
SafetyFebruary 21, 2020February 25, 20205
OverflowFebruary 26, 2020May 17, 202082
SafetyMay 18, 2020May 23, 20206
OverflowMay 24, 2020June 27, 202035
SafetyJune 28, 2020July 20, 202023
OverflowJuly 21, 2020July 24, 20204
SafetyJuly 25, 2020July 29, 20205
OverflowJuly 30, 2020August 4, 20206
SafetyAugust 5, 2020August 6, 20202
OverflowAugust 7, 2020May 25, 2021291
SafetyMay 26, 2021May 28, 20213
OverflowMay 29, 2021June 3, 20216
SafetyJune 4, 2021August 30, 202188
ObservationAugust 31, 2021September 16, 202117
SafetySeptember 17, 2021October 11, 202125
OverflowOctober 12, 2021July 10, 20251368
SafetyJuly 11, 2025August 17, 202538
OverflowAugust 18, 2025August 20, 20253
SafetyAugust 21, 2025October 31, 202572
OverflowNovember 1, 2025August 19, 2026292
SafetyAugust 20, 2026August 23, 20264

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.