Puerto Rico's reservoirs, every morning

AAA 5:00 AM reading · November 10. Levels in meters above sea level; change is against the previous morning.

Fuller is better
Red line: the band below that level
Green number: full

How to read the bars

Each bar reads like a fuel gauge: the solid bar is the level on AAA’s chart, and the pale zones behind it are AAA’s alert bands, worst at the left. The red line is labeled with the band the reservoir falls into below that level, and the green number is the full line. The hollow tick marks the level about a week back; the gap to NOW is the drift. Where a row also says “Gauge now”, that is the USGS dam gauge’s latest reading. Tap or select a bar for its exact thresholds.

Behind the rationing

Carraízo179k accountsServes San Juan, Trujillo Alto, Carolina, Canóvanas, Gurabo

SafeSeguridad40.90 m 2 cm since yesterday40.95

History

Date	Level	Change
Nov 10	40.90 m on AAA's chart; the USGS gauge read 40.90 m at 5:00 AM	+0.02
Nov 9	40.88 m on AAA's chart; the USGS gauge read 40.91 m at 5:00 AM	−0.08
Nov 8	40.96 m on AAA's chart; the USGS gauge read 40.96 m at 5:00 AM	+0.13
Nov 7	40.83 m on AAA's chart; the USGS gauge read 40.83 m at 5:00 AM	−0.01
Nov 6	40.84 m on AAA's chart; the USGS gauge read 40.84 m at 5:00 AM	−0.01
Nov 5	40.85 m on AAA's chart; the USGS gauge read 40.85 m at 5:00 AM	+0.15
Nov 4	40.70 m on AAA's chart; the USGS gauge read 40.70 m at 5:00 AM	−0.02

Dotted levels were checked against the USGS dam gauge. Hover or tap one for its 5:00 AM reading.

23 earlier days

Every day on record for Carraízo is in the spreadsheet (CSV).

La Plata131k accountsServes Dorado, Guaynabo, Naranjito, Toa Alta, Toa Baja, Vega Alta, Bayamón, Cataño, Corozal

AdjustmentsAjustes42.93 m 42 cm since yesterday51.340.5

History

Date	Level	Change
Nov 10	42.93 m on AAA's chart; the USGS gauge read 42.95 m at 5:00 AM	+0.42
Nov 9	42.51 m on AAA's chart; the USGS gauge read 42.53 m at 5:00 AM	+0.13
Nov 8	42.38 m on AAA's chart; the USGS gauge read 42.39 m at 5:00 AM	+0.28
Nov 7	42.10 m on AAA's chart; the USGS gauge read 42.11 m at 5:00 AM	+0.26
Nov 6	41.84 m on AAA's chart; the USGS gauge read 41.85 m at 5:00 AM	+0.06
Nov 5	41.78 m on AAA's chart; the USGS gauge read 41.77 m at 5:00 AM	−0.05
Nov 4	41.83 m on AAA's chart; the USGS gauge read 41.82 m at 5:00 AM	−0.11

Dotted levels were checked against the USGS dam gauge. Hover or tap one for its 5:00 AM reading.

23 earlier days

Every day on record for La Plata is in the spreadsheet (CSV).

Cidra15k accountsServes Aguas Buenas, Caguas, Cayey, Cidra

WatchObservación400.95 m 1 cm since yesterday403400.23

History

Date	Level	Change
Nov 10	400.95 m on AAA's chart; the USGS gauge read 400.95 m at 5:00 AM	+0.01
Nov 9	400.94 m on AAA's chart; the USGS gauge read 400.94 m at 5:00 AM	+0.12
Nov 8	400.82 m on AAA's chart; the USGS gauge read 400.82 m at 5:00 AM	±0.00
Nov 7	400.82 m on AAA's chart; the USGS gauge read 400.82 m at 5:00 AM	±0.00
Nov 6	400.82 m on AAA's chart; the USGS gauge read 400.82 m at 5:00 AM	±0.00
Nov 5	400.82 m on AAA's chart; the USGS gauge read 400.82 m at 5:00 AM	+0.24
Nov 4	400.58 m on AAA's chart; the USGS gauge read 400.58 m at 5:00 AM	±0.00

Dotted levels were checked against the USGS dam gauge. Hover or tap one for its 5:00 AM reading.

23 earlier days

Every day on record for Cidra is in the spreadsheet (CSV).

Across the island: 16 more reservoirs4 spilling · 12 safe

CaonillasUtuado · PREPA
SafeSeguridad251.84 mdown 4 cm since yesterday252248
History
Date Level Change
Nov 10 251.84 m −0.04
Nov 9 251.88 m +0.08
Nov 8 251.80 m +0.04
Nov 7 251.76 m +0.06
Nov 6 251.70 m +0.04
Nov 5 251.66 m +0.07
Nov 4 251.59 m +0.05
23 earlier days
Every day on record for Caonillas is in the spreadsheet (CSV).
Carite15k accountsServes Caguas, Cayey, Cidra, Guayama, Patillas, San Lorenzo
SafeSeguridad542.80 mNo change since yesterday542.94541.16
History
Date Level Change
Nov 10 542.80 m ±0.00
Nov 9 542.80 m +0.05
Nov 8 542.75 m ±0.00
Nov 7 542.75 m ±0.00
Nov 6 542.75 m ±0.00
Nov 5 542.75 m +0.03
Nov 4 542.72 m ±0.00
23 earlier days
Every day on record for Carite is in the spreadsheet (CSV).
Cerrillos51k accountsServes Ponce, Peñuelas
SafeSeguridad166.53 mup 4 cm since yesterday174.7160.9
History
Date Level Change
Nov 10 166.53 m +0.04
Nov 9 166.49 m +0.26
Nov 8 166.23 m +0.02
Nov 7 166.21 m +0.02
Nov 6 166.19 m −0.04
Nov 5 166.23 m −0.01
Nov 4 166.24 m +0.01
23 earlier days
Every day on record for Cerrillos is in the spreadsheet (CSV).
Fajardo32k accountsServes Ceiba, Fajardo, Luquillo, Río Grande
SafeSeguridad51.46 mup 3 cm since yesterday52.548.3
History
Date Level Change
Nov 10 51.46 m +0.03
Nov 9 51.43 m +0.13
Nov 8 51.30 m +0.11
Nov 7 51.19 m −0.01
Nov 6 51.20 m −0.02
Nov 5 51.22 m −0.02
Nov 4 51.24 m +0.03
23 earlier days
Every day on record for Fajardo is in the spreadsheet (CSV).
GarzasAdjuntas · PREPA
SafeSeguridad736.08 mNo change since yesterday736.09733.04
History
Date Level Change
Nov 10 736.08 m ±0.00
Nov 9 736.08 m ±0.00
Nov 8 736.08 m +0.02
Nov 7 736.06 m +0.01
Nov 6 736.05 m −0.02
Nov 5 736.07 m +0.04
Nov 4 736.03 m −0.02
23 earlier days
Every day on record for Garzas is in the spreadsheet (CSV).
Guajataca63k accountsServes Moca, Aguadilla, Aguada, Isabela, San Sebastián, Quebradillas, Bo. Puntas de Rincón
SafeSeguridad196.48 mup 16 cm since yesterday196.5194
History
Date Level Change
Nov 10 196.48 m +0.16
Nov 9 196.32 m ±0.00
Nov 8 196.32 m −0.04
Nov 7 196.36 m −0.01
Nov 6 196.37 m +0.03
Nov 5 196.34 m −0.01
Nov 4 196.35 m −0.08
23 earlier days
Every day on record for Guajataca is in the spreadsheet (CSV).
GuayabalJuana Díaz · PREPA
SafeSeguridad103.93 mNo change since yesterday103.94102.72
History
Date Level Change
Nov 10 103.93 m ±0.00
Nov 9 103.93 m −0.01
Nov 8 103.94 m +0.04
Nov 7 103.90 m +0.02
Nov 6 103.88 m −0.02
Nov 5 103.90 m −0.06
Nov 4 103.96 m +0.06
23 earlier days
Every day on record for Guayabal is in the spreadsheet (CSV).
LucchettiYauco · PREPA
SafeSeguridad171.71 mup 6 cm since yesterday173.74170.69
History
Date Level Change
Nov 10 171.71 m +0.06
Nov 9 171.65 m −0.01
Nov 8 171.66 m −0.01
Nov 7 171.67 m −0.03
Nov 6 171.70 m −0.13
Nov 5 171.83 m −0.12
Nov 4 171.95 m −0.14
23 earlier days
Every day on record for Lucchetti is in the spreadsheet (CSV).
MatrullasOrocovis · PREPA
SafeSeguridad735.13 mup 14 cm since yesterday736.09733.04
History
Date Level Change
Nov 10 735.13 m +0.14
Nov 9 734.99 m +0.20
Nov 8 734.79 m +0.10
Nov 7 734.69 m +0.12
Nov 6 734.57 m +0.11
Nov 5 734.46 m +0.06
Nov 4 734.40 m +0.07
23 earlier days
Every day on record for Matrullas is in the spreadsheet (CSV).
Patillas14k accountsServes Arroyo, Guayama, Maunabo, Patillas
SafeSeguridad65.72 mdown 3 cm since yesterday6662.18
History
Date Level Change
Nov 10 65.72 m −0.03
Nov 9 65.75 m +0.03
Nov 8 65.72 m ±0.00
Nov 7 65.72 m +0.02
Nov 6 65.70 m +0.02
Nov 5 65.68 m +0.05
Nov 4 65.63 m +0.01
23 earlier days
Every day on record for Patillas is in the spreadsheet (CSV).
Río Blanco29k accountsServes Humacao, Yabucoa, Naguabo, Vieques, Culebra
SafeSeguridad28.72 mup 9 cm since yesterday28.7526.5
History
Date Level Change
Nov 10 28.72 m +0.09
Nov 9 28.63 m +0.14
Nov 8 28.49 m +0.09
Nov 7 28.40 m ±0.00
Nov 6 28.40 m −0.02
Nov 5 28.42 m −0.01
Nov 4 28.43 m +0.02
23 earlier days
Every day on record for Río Blanco is in the spreadsheet (CSV).
Toa Vaca19k accountsServes Ponce, Juana Díaz, Coamo, Villalba
SafeSeguridad148.34 mup 2 cm since yesterday164147
History
Date Level Change
Nov 10 148.34 m +0.02
Nov 9 148.32 m +0.04
Nov 8 148.28 m +0.01
Nov 7 148.27 m +0.01
Nov 6 148.26 m +0.01
Nov 5 148.25 m +0.01
Nov 4 148.24 m +0.01
23 earlier days
Every day on record for Toa Vaca is in the spreadsheet (CSV).
Dos BocasArecibo · PREPA
SpillingDesborde89.94 mdown 23 cm since yesterday89.92
History
Date Level Change
Nov 10 89.94 m −0.23
Nov 9 90.17 m +0.38
Nov 8 89.79 m −0.01
Nov 7 89.80 m +0.24
Nov 6 89.56 m −0.09
Nov 5 89.65 m +0.09
Nov 4 89.56 m +0.08
23 earlier days
Every day on record for Dos Bocas is in the spreadsheet (CSV).
GuayoLares · PREPA
SpillingDesborde445.01 mdown 9 cm since yesterday445.01
History
Date Level Change
Nov 10 445.01 m −0.09
Nov 9 445.10 m +0.02
Nov 8 445.08 m −0.04
Nov 7 445.12 m +0.05
Nov 6 445.07 m +0.04
Nov 5 445.03 m +0.11
Nov 4 444.92 m +0.19
23 earlier days
Every day on record for Guayo is in the spreadsheet (CSV).
GuineoOrocovis · PREPA
SpillingDesborde902.44 mdown 1 cm since yesterday902.21
History
Date Level Change
Nov 10 902.44 m −0.01
Nov 9 902.45 m +0.19
Nov 8 902.26 m +0.05
Nov 7 902.21 m +0.05
Nov 6 902.16 m +0.06
Nov 5 902.10 m +0.07
Nov 4 902.03 m +0.13
23 earlier days
Every day on record for Guineo is in the spreadsheet (CSV).
LocoYauco · PREPA
SpillingDesborde70.20 mdown 1 cm since yesterday70.1
History
Date Level Change
Nov 10 70.20 m −0.01
Nov 9 70.21 m −0.02
Nov 8 70.23 m +0.02
Nov 7 70.21 m +0.03
Nov 6 70.18 m −0.02
Nov 5 70.20 m +0.02
Nov 4 70.18 m +0.01
23 earlier days
Every day on record for Loco is in the spreadsheet (CSV).

Date	Level	Change
Nov 10	251.84 m	−0.04
Nov 9	251.88 m	+0.08
Nov 8	251.80 m	+0.04
Nov 7	251.76 m	+0.06
Nov 6	251.70 m	+0.04
Nov 5	251.66 m	+0.07
Nov 4	251.59 m	+0.05

Date	Level	Change
Nov 10	542.80 m	±0.00
Nov 9	542.80 m	+0.05
Nov 8	542.75 m	±0.00
Nov 7	542.75 m	±0.00
Nov 6	542.75 m	±0.00
Nov 5	542.75 m	+0.03
Nov 4	542.72 m	±0.00

Date	Level	Change
Nov 10	166.53 m	+0.04
Nov 9	166.49 m	+0.26
Nov 8	166.23 m	+0.02
Nov 7	166.21 m	+0.02
Nov 6	166.19 m	−0.04
Nov 5	166.23 m	−0.01
Nov 4	166.24 m	+0.01

Date	Level	Change
Nov 10	51.46 m	+0.03
Nov 9	51.43 m	+0.13
Nov 8	51.30 m	+0.11
Nov 7	51.19 m	−0.01
Nov 6	51.20 m	−0.02
Nov 5	51.22 m	−0.02
Nov 4	51.24 m	+0.03

Date	Level	Change
Nov 10	736.08 m	±0.00
Nov 9	736.08 m	±0.00
Nov 8	736.08 m	+0.02
Nov 7	736.06 m	+0.01
Nov 6	736.05 m	−0.02
Nov 5	736.07 m	+0.04
Nov 4	736.03 m	−0.02

Date	Level	Change
Nov 10	196.48 m	+0.16
Nov 9	196.32 m	±0.00
Nov 8	196.32 m	−0.04
Nov 7	196.36 m	−0.01
Nov 6	196.37 m	+0.03
Nov 5	196.34 m	−0.01
Nov 4	196.35 m	−0.08

Date	Level	Change
Nov 10	103.93 m	±0.00
Nov 9	103.93 m	−0.01
Nov 8	103.94 m	+0.04
Nov 7	103.90 m	+0.02
Nov 6	103.88 m	−0.02
Nov 5	103.90 m	−0.06
Nov 4	103.96 m	+0.06

Date	Level	Change
Nov 10	171.71 m	+0.06
Nov 9	171.65 m	−0.01
Nov 8	171.66 m	−0.01
Nov 7	171.67 m	−0.03
Nov 6	171.70 m	−0.13
Nov 5	171.83 m	−0.12
Nov 4	171.95 m	−0.14

Date	Level	Change
Nov 10	735.13 m	+0.14
Nov 9	734.99 m	+0.20
Nov 8	734.79 m	+0.10
Nov 7	734.69 m	+0.12
Nov 6	734.57 m	+0.11
Nov 5	734.46 m	+0.06
Nov 4	734.40 m	+0.07

Date	Level	Change
Nov 10	65.72 m	−0.03
Nov 9	65.75 m	+0.03
Nov 8	65.72 m	±0.00
Nov 7	65.72 m	+0.02
Nov 6	65.70 m	+0.02
Nov 5	65.68 m	+0.05
Nov 4	65.63 m	+0.01

Date	Level	Change
Nov 10	28.72 m	+0.09
Nov 9	28.63 m	+0.14
Nov 8	28.49 m	+0.09
Nov 7	28.40 m	±0.00
Nov 6	28.40 m	−0.02
Nov 5	28.42 m	−0.01
Nov 4	28.43 m	+0.02

Date	Level	Change
Nov 10	148.34 m	+0.02
Nov 9	148.32 m	+0.04
Nov 8	148.28 m	+0.01
Nov 7	148.27 m	+0.01
Nov 6	148.26 m	+0.01
Nov 5	148.25 m	+0.01
Nov 4	148.24 m	+0.01

Date	Level	Change
Nov 10	89.94 m	−0.23
Nov 9	90.17 m	+0.38
Nov 8	89.79 m	−0.01
Nov 7	89.80 m	+0.24
Nov 6	89.56 m	−0.09
Nov 5	89.65 m	+0.09
Nov 4	89.56 m	+0.08

Date	Level	Change
Nov 10	445.01 m	−0.09
Nov 9	445.10 m	+0.02
Nov 8	445.08 m	−0.04
Nov 7	445.12 m	+0.05
Nov 6	445.07 m	+0.04
Nov 5	445.03 m	+0.11
Nov 4	444.92 m	+0.19

Date	Level	Change
Nov 10	902.44 m	−0.01
Nov 9	902.45 m	+0.19
Nov 8	902.26 m	+0.05
Nov 7	902.21 m	+0.05
Nov 6	902.16 m	+0.06
Nov 5	902.10 m	+0.07
Nov 4	902.03 m	+0.13

Date	Level	Change
Nov 10	70.20 m	−0.01
Nov 9	70.21 m	−0.02
Nov 8	70.23 m	+0.02
Nov 7	70.21 m	+0.03
Nov 6	70.18 m	−0.02
Nov 5	70.20 m	+0.02
Nov 4	70.18 m	+0.01

AAA’s alert bands, fullest to emptiest:

Spilling DesbordeAt the spillway, releasing excess
Safe SeguridadNormal supply
Watch ObservaciónBelow normal; conservation urged
Adjustments AjustesOperational adjustments, like pressure cuts
ControlDrought controls; rationing-level measures
Out of service Fuera de servicioToo low to draw from

Source: Autoridad de Acueductos y Alcantarillados, daily reservoir monitoring.